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IMA 2017-009b = laverovite (no replies)

March 27, 2019, 12:34 pm
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Reference:
▪ Sokolova E., Day M.C., Hawthorne F.C., Kasatkin A.V., Downs R.A., Horváth L., Pfenninger-Horváth E. (2019): Laverovite, K2NaMn7Zr2(Si4O12)2O2(OH)4F, a New Astrophyllite-supergroup Mineral from Mont Saint-hilaire, Québec, Canada. Canadian Mineralogist, 57, 201-213.

Abstract:
Laverovite (IMA 2017-009b), ideally K2NaMn7Zr2(Si4O12)2O2(OH)4F, is a kupletskite-group (astrophyllite-supergroup) mineral from Mont Saint-Hilaire, Québec, Canada. Associated minerals are zircophyllite, kupletskite, astrophyllite, aegirine, analcime, orthoclase, and albite. Laverovite is brown, transparent in thin grains, and has a vitreous luster. Mohs hardness is 3, Dcalc. = 3.367 g/cm3. Laverovite is biaxial (–) with refractive indices (λ = 589 nm) α = 1.670(2), β = 1.710(5), γ = 1.740(5); 2Vmeas. = 82(2)°, 2Vcalc. = 80°, strong dispersion: r > v. Cleavage is perfect parallel to {001}. Chemical analysis by electron microprobe gave Nb2O5 0.56, ZrO2 9.78, TiO2 4.69, SiO2 33.52, Al2O3 0.94, SrO 0.13, ZnO 0.07, FeO 13.94, MnO 20.51, CaO 0.48, MgO 0.76, Cs2O 0.05, K2O 6.00, Na2O 2.28, F 1.80, H2Ocalc. 2.57, sum 97.32 wt.%; H2O was calculated from crystal-structure analysis. The empirical formula based on 31.15 (O + F) apfu with [OH + F = 5 pfu and H2O = 0.15 pfu] is (K1.78Sr0.02Cs0.01□0.19)Σ2(□1.85Na0.15)Σ2(Na0.88Ca0.12)Σ1(Mn4.03Fe2+2.71Mg0.25Zn0.01)Σ7(Zr1.11Ti0.82Nb0.06Mg0.01)Σ2[(Si7.78Al0.26)Σ8.04O24]O2[(OH)3.68F0.32]Σ4F[□1.85(H2O)0.15]Σ2, Z = 1. The simplified formula is K2Na(Mn,Fe2+)7(Zr,Ti)2(Si4O12)2O2 (OH)4F. Laverovite is triclinic, space group P-1⁠, a 5.4329(1), b 11.9232(3), c 11.7491(3) Å, α 112.905(2), β 94.696(1), γ 103.178(1)°, V 670.14(5) Å3. The six strongest lines in the X-ray powder diffraction data [d (Å)(I)(hkl)] are: 3.452(92)(003,111); 2.788(97) (-1-31, 1-42), 2.680(68) (-211), 2.589(100) (130, 1-43), ⁠; 2.504(44) (-212)⁠, and 1.590(50) (3-51, -3-22)⁠. The crystal structure has been refined to R1 = 3.26% for 3757 observed (Fo > 4σF) reflections. In the crystal structure of laverovite, there are four [4]T sites, with = 1.621 Å, occupied mainly by Si, with minor Al. TO4 tetrahedra constitute the T4O12 astrophyllite ribbon. The Zr-dominant [6]D site is occupied mainly by Zr and Ti and minor Nb and Mg, with = 2.002 Å (φ = O, F). The T4O12 astrophyllite ribbons and D octahedra constitute the H (Heteropolyhedral) sheet. In the O (Octahedral) sheet, there are four Mn2+-dominant [6]M(1–4) sites, with = 2.187, 2.174, 2.161, and 2.146 Å (φ = O, OH). Two H sheets and the central O sheet form the HOH block, and adjacent HOH blocks link via a common XPD anion of two D octahedra. In the I (Intermediate) block between adjacent HOH blocks, there are two interstitial cation sites, A and B, and a WA site, partly occupied by H2O. The A site splits into two partly occupied sites, [13]A(1) and [6]A(2), with A(1)–A(2) = 1.108 Å. The [13]A(1) site is occupied at 90.5%: mainly by K, with minor Sr and Cs, = 3.326 Å; the [6]A(2) site is occupied at 7.5% by Na: [□1.85Na0.15], = 2.29 Å (φ = O, F, H2O). The aggregate content of the A site is (K1.78Sr0.02Cs0.01Na0.15□0.04)Σ2, ideally K2apfu. The [10]B site is occupied by (Na0.88Ca0.12), = 2.646 Å. The WA site is occupied at 7.5% by H2O: [□1.85(H2O)0.15] pfu. The presence of OH and H2O groups in the laverovite structure was confirmed by infrared spectroscopy. The mineral is named “laverovite” after Professor Nikolay Pavlovich Laverov (1930–2016), Academician of the Russian Academy of Sciences, a prominent Russian ore geologist and an expert in uranium ore deposits and radiogenic waste disposal. Laverovite is a Mn-analogue of zircophyllite, K2NaFe2+7Zr2(Si4O12)2O2(OH)4F.
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IMA 2015-092 = whiteite-(MnMnMg) (no replies)

March 27, 2019, 12:35 pm
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Reference:
▪ Elliott, P. & Willis, A.C. (2019): Whiteite-(MnMnMg), a New Jahnsite-Group Mineral from Iron Monarch, South Australia: Description and Crystal Structure. Canadian Mineralogist, 57, 215-223.

Abstract:
Whiteite-(MnMnMg), is a new jahnsite-group mineral found at the Iron Monarch Quarry, Iron Knob, South Australia, Australia, where it occurs associated with triploidite, rhodochrosite, and an unidentified Ca,Mn phosphate carbonate mineral. The new mineral occurs as a single unterminated, reddish, orange, prismatic crystal 1.2 mm in length and 0.3 mm across. The mineral is uniaxial (–), with α = 1.582(2), β = 1.586(2), γ = 1.613(2). The calculated 2V is 74.5°. The streak is pale orange. The luster is vitreous and the mineral is translucent. The mineral is brittle with an irregular fracture and a good cleavage parallel to {001}; its Mohs hardness is ∼4. The measured specific gravity is 2.61(4) g/cm3. The empirical formula, calculated on the basis of 26 O atoms per formula unit, is (Mn2+0.60,Ca0.41,Na0.03,K0.01)Σ1.05(Mn2+0.92,Mg0.08)Σ1.00Mg2.00(Al1.82,Mn3+0.18)Σ2.00(PO4)4.00(OH)2.06·7.95H2O. Whiteite-(MnMnMg) is monoclinic with space group P2/a; its unit-cell parameters are a 15.0357(18), b 6.9408(5), c 9.9431(9) Å, β 110.827(8)°, V 969.86(16) Å3, and Z = 2. The eight strongest lines in the X-ray powder diffraction pattern are [dobs Å (I) (hkl)]: 9.244(100)(001), 5.619(32) (-11-1), 4.839(20) (111) (20-2), 4.111(16) (1-1-2)⁠, 3.501(22) (3-1-2) (400, 020, 40-2)⁠ , 2.936(16)(401), 2.759(30)(022,510), and 2.566(17) (42-1)⁠. The crystal structure has been refined from single-crystal X-ray data to R = 0.0396 for 23,703 unique observed reflections (Fo > 4σFo). The mineral is named for the chemical composition, in accordance with jahnsite group nomenclature.
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IMA 2018-096 = jahnsite-(MnMnFe) (no replies)

March 27, 2019, 12:36 pm
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Reference;
▪ Vignola, P., Hatert, F., Rotiroti, N., Nestola, F., Risplendente, A., Vanini, F. (2019): Jahnsite-(MnMnFe), Mn2+Mn2+Fe2+2Fe3+2(PO4)4(OH)2·8H2O, a New Phosphate Mineral from the Malpensata Pegmatite, Olgiasca, Colico Municipality, Lecco Province, Italy. Canadian Mineralogist, 57, 225-233.

Abstract:
Jahnsite-(MnMnFe), Mn2+Mn2+Fe2+2Fe3+2(PO4)4(OH)2·8H2O (IMA 2018-096), is a new phosphate belonging to the jahnsite subgroup of the jahnsite group of minerals. It was found in the dumps of the Malpensata pegmatite mine close to the village of Olgiasca, Colico municipality, Lecco province, Italy by one of the authors (F.V.). The mineral occurs on the surfaces of a hydrothermal cavity as prisms elongated along a, weakly flattened on {010}, and twinned by reflection on {001}, up to 130 μm in size. The new species occurs in close association with rockbridgeite as a late stage product of alteration of primary phosphate minerals including graftonite-(Mn). Its color is dark brown and it is partially transparent with a vitreous luster. The streak is pale greenish brown. Jahnsite-(MnMnFe) is brittle with a good cleavage on {001}. Its Mohs hardness is 4 and the calculated density is 2.654 g/cm3. The mineral is optically biaxial (–) with α = 1.673, β = 1.685, γ = 1.689, and 2V (calc.) = 60 °, and it is non-fluorescent under 254 nm (short wave) and 366 nm (long wave). The empirical formula is: (Mn0.40Ca0.25Na0.05)Σ0.70Mn(Fe2+1.39Mn0.43Mg0.14Zn0.03)Σ2.00(Fe3+1.99Al0.01)Σ2(PO4)4(OH)1.35·8H2O. Jahnsite-(MnMnFe) is monoclinic, with space group P2/a and unit-cell parameters a = 15.1559(6) Å, b = 7.1478(2) Å, c = 10.0209(4) Å, and β = 112.059(4)° with V = 1006.11(6) Å3 for Z = 2. The eight strongest measured lines in the XRPD pattern are [d in Å, (I/I0), (hkl)]: 2.590 (100) (-421) 9.221 (89) (001), 2.840 (82) (320), 4.932 (78) (-211) 4.651 (78) (002), 3.971 (71) (211), 3.504 (64) (-400)⁠, and 3.295 (46) (-203)⁠. Its crystal structure was refined and conforms with the general structure described for jahnsite-group minerals.
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IMA 2018-024 / 2018-036 = pandoraite-Ba / pandoraite-Ca (no replies)

March 27, 2019, 12:37 pm
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Reference:
▪ Kampf, A.R., Hughes, J.M., Nash, B.P., Marty, J. (2019): Pandoraite-Ba and Pandoraite-Ca, Ba(V4+5V5+2)O16·3H2O and Ca(V4+5V5+2)O16·3H2O, Two New Vanadium Oxide Bronze Minerals in Solid Solution from the Pandora Mine, La Sal Mining District, San Juan County, Colorado, Usa. Canadian Mineralogist, 57, 255-265.

Abstract:
Pandoraite-Ba, BaV4+5V5+2O16·3H2O, and pandoraite-Ca, CaV4+5V5+2O16·3H2O, are two new vanadium-oxide-bronze minerals from the Pandora mine, La Sal district, San Juan County, Colorado, USA. Pandoraite-Ba and pandoraite-Ca are rare secondary minerals and occur on a matrix consisting of recrystallized quartz grains from the original sandstone. Crystals of carnotite are associated with pandoraite-Ba and crystals of finchite are associated with pandoraite-Ca. The minerals occur as thin, dark blue, square plates up to approximately 100 μm across and approximately 2 μm thick. Plates occur in subparallel to random intergrowths. The streak of both minerals is light greenish blue, and they display a vitreous, transparent luster and brittle tenacity; neither mineral displays fluorescence. The Mohs hardness of pandoraite-Ba and pandoraite-Ca is ca. 2½. Cleavage for both minerals is perfect on {001}. For pandoraite-Ba, densitymeas = 3.24(1) g/cm3. For pandoraite-Ca, density meas = 2.91(1) g/cm3. Both minerals are biaxial (pseudo-uniaxial) (–). For pandoraite-Ba, α (ε) =1.81(2), β and γ (ω) = 1.84(1). For pandoraite-Ca, α (ε) = 1.80(2), β and γ (ω) = 1.83(1). Similar greenish-blue pleochroism is found in both minerals, Y and Z (O) > X (E). For pandoraite-Ba, the empirical formula from electron probe microanalysis (EPMA) (calculated on the basis of V + Fe + Al = 7 and O = 19 apfu) is (Ba0.83Sr0.09Ca0.05Na0.03K0.02)Σ1.02(V4+4.25V5+2.38Fe3+0.35Al0.02)Σ7.00O16·3H2O, and for pandoraite-Ca it is (Ca0.62Ba0.07Sr0.02Na0.01K0.01)Σ0.73(V4+3.70V5+2.93Fe3+0.37Al0.01)Σ7.01O16·3H2O. EPMA demonstrates that solid solution exists between the phases. Pandoraite-Ba is monoclinic (pseudo-tetragonal), P2, with a 6.1537(16), b 6.1534(18), c 21.356(7) Å, β 90.058(9)°, and V 808.7(4) Å3, determined by single-crystal X-ray diffractometry. Pandoraite-Ca, inferred to be isostructural with the Ba-dominant phase, has a 6.119(8), b 6.105(8), c 21.460(9)Å, β 90.06(14)°, and V 801.7(15) Å3, determined by refinement of powder diffraction data. The atomic arrangement of pandoraite-Ba was solved and refined to R1 = 0.0573 for 3652 independent reflections with I > 2σI. Pandoraite-Ba and pandoraite-Ca have vanadium oxide bronze layer structures formed of sheets of V7O16 polyhedra that form the structural unit and (Ba,Ca)(H2O)3 interlayers; the vanadium is of mixed valence (4+, 5+), with the reduction of pentavalent vanadium occurring to balance the charge of the Ba “insertion” ions in partially occupied sites in the interlayer. A tetragonal synthetic analog is known.
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New mineral proposals approved by IMA CNMNC in February and March 2019 (5 replies)

April 4, 2019, 11:01 am
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NEW MINERAL PROPOSALS APPROVED IN FEBRUARY 2019

IMA No. 2018-131
Kollerite
(NH4)2Fe3+(SO3)2(OH)·H2O
In a coal open pit near Köves Hill, Pécs-Vasas, Mecsek Mts., Hungary (46.16°N, 18.32°E)
Béla Fehér*, István Sajó, László Kótai, Sándor Szakáll, Martin Ende, Herta Effenberger, Judith Mihály and Dávid Szabó
*E-mail: feherbela@upcmail.hu
New structure type
Orthorhombic: Cmcm; structure determined
a = 17.803(7), b = 7.395(4), c = 7.096(3) Å
8.905(100), 6.830(61), 3.887(8), 3.417(17), 3.283(8), 2.973(15), 2.847(16), 2.643(9)
Type material is deposited in the mineralogical collections of the Herman Ottó Museum, Kossuth u. 13, H-3525 Miskolc, Hungary, catalogue number 2018.201 (holotype), and the Hungarian Natural History Museum, Ludovika tér 2-6, H-1083 Budapest, Hungary, catalogue number Gyn/3591 (cotype)
How to cite: Fehér, B., Sajó, I., Kótai, L., Szakáll, S., Ende, M., Effenberger, H., Mihály, J. and Szabó, D. (2019) Kollerite, IMA 2018-131. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical Magazine, 83, xxx-xxx.

IMA No. 2018-133
Nixonite
Na2Ti6O13
Darby kimberlite field, beneath the west central Rae Craton, ca. 200 km SW of the community of Kugaaruk, Nunavut, Canada (67°23’56.6”N, 93°21’13.9”W)
Chiara Anzolini*, Fei Wang, Garrett A. Harris, Andrew J. Locock, Dongzhou Zhang, Steven D. Jacobsen and D. Graham Pearson
*E-mail: anzolini@ualberta.ca
The Na analogue of jeppeite
Monoclinic: C2/m
a = 15.363(3), b = 3.7782(7), c = 9.127(1) Å, β = 99.3(1)°
7.57(73), 6.31(68), 3.66(75), 3.02(100), 2.96(63), 2.71(62), 2.09(51), 1.89(48)
Type material is deposited in the mineralogical collections of the Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario M5S 2C6, Canada, catalogue number M59224
How to cite: Anzolini, C., Wang, F., Harris, G.A., Locock, A.J., Zhang, D., Jacobsen, S.D. and Pearson, D.G. (2018) Nixonite, IMA 2018-133. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical Magazine, 83, xxx-xxx.

IMA No. 2017-091a
Khangalasite
Fe(SO4)(OH)·2H2O
Upper Khangalas Creek, left tributary of the Nera River, Yakutia, Russia (64°05’58”N, 144°55’02”E)
Maxim V. Kudrin*, Nadezhda V. Zayakina, Valery Y. Fridovsky and Larisa T. Galenchikova
*E-mail: kudrinmv@mail.ru
A polymorph of butlerite and parabutlerite
Triclinic: P1 or P1
a = 7.30(1), b = 10.96(2), c =11.70(2) Å, α = 108(1), β = 102.1(4), γ = 97.0(2)°
10.72(100), 10.22(80), 9.12(28), 6.73(3), 5.356(8), 4.108(10), 3.758(9), 3.476(4)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian
Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number
4254/1
How to cite: Kudrin, M.V., Zayakina, N.V., Fridovsky, V.V. and Galenchikova, L.T. (2019)
Khangalasite, IMA 2017-091a. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical
Magazine, 83, xxx-xxx.

NEW MINERAL PROPOSALS APPROVED IN MARCH 2019

IMA No. 2018-136
Spiridonovite
(Cu1–xAgx)2Te (x ≈ 0.4)
Good Hope mine, Vulcan, Gunnison Co., Colorado, USA (38°20’35”N, 107°0’26”W)
Luca Bindi* and Marta Morana
*E-mail: luca.bindi@unifi.it
Chemically related to weissite
Trigonal: P3 c1; structure determined
a = 4.630(2), c = 22.551(9) Å
3.78(60), 3.76(20), 2.317(100), 2.035(85), 1.973(15), 1.635(30), 1.338(10), 1.333(25)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale,
Università di Firenze, Via La Pira 4, I-50121, Firenze, Italy, catalogue number 3295/I
How to cite: Bindi, L. and Morana, M. (2019) Spiridonovite, IMA 2018-136. CNMNC Newsletter
No. 48, April 2019, page xxx; Mineralogical Magazine, 83, xxx-xxx.

IMA No. 2018-137
Lazaraskeite
Cu(C2H3O3)2
Western end of Pusch Ridge, Santa Catalina Mountains, Pima Co., Arizona, USA (32°21’42”N,
110°57’30”W)
Hexiong Yang*, Ronald B. Gibbs, Xiangping Gu, Stanley H. Evans, Robert T. Downs and Zak
Jabrin
*E-mail: hyang@email.arizona.edu
Known synthetic analogue
Monoclinic: P21/n; structure determined
a = 5.1049(2), b = 8.6742(4), c = 7.7566(3) Å, β = 106.834(2)°
5.64(100), 4.77(52), 4.25(21), 3.34(63), 3.23(25), 2.50(22), 2.22(25), 2.09(22)
Type material is deposited in the collections of the University of Arizona Mineral Museum, 1601 E
University Blvd, Tucson, AZ 85719, USA, catalogue # 22052 (holotype), and the RRUFF Project,
deposition # R180026 (cotype)
How to cite: Yang, H., Gibbs, R.B., Gu, X., Evans, S.H., Downs, R.T. and Jabrin, Z. (2019)
Lazaraskeite, IMA 2018-137. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical
Magazine, 83, xxx-xxx.

IMA No. 2018-139
Isselite
Cu6(SO4)(OH)10·5H2O
Lagoscuro mine, Ceranesi, Genoa Province, Liguria, Italy (44°28’35”N, 8°51’35”E)
Cristian Biagioni*, Donato Belmonte, Cristina Carbone, Roberto Cabella, Nicola Demitri, Natale Perchiazzi, Anthony R. Kampf and Ferdinando Bosi
*E-mail: cristian.biagioni@unipi.it
Chemically, the Cu analogue of guarinoite
Orthorhombic: Pmn21; structure determined
a = 6.807(1), b = 5.897(1), c = 20.653(4) Å
10.3(s), 6.4(m), 5.67(mw), 4.84(vs), 3.400(mw), 2.708(s), 2.225(m), 2.179(mw)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (Pisa, Italy), catalogue number 19904 (holotype), the Dipartimento di Scienze della Terra, dell’Ambiente e della Vita (DISTAV), Università di Genova, Corso Europa 26, Genova, Italy, catalogue number MO484 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 67195 (cotype)
How to cite: Biagioni, C., Belmonte, D., Carbone, C., Cabella, R., Demitri, N., Perchiazzi, N., Kampf, A.R. and Bosi, F. (2019) Isselite, IMA 2018-139. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical Magazine, 83, xxx-xxx.

IMA No. 2018-140
Khurayyimite
Ca7Zn4(Si2O7)2(OH)10·4H2O
Northern part of the Daba-Siwaqa pyrometamorphic rock area, Hatrurim Complex, ca. 80 km S of Amman, Jordan (31°24’23”N, 36°15’06”E)
Irina O. Galuskina*, Biljana Krüger, Evgeny V. Galuskin, Yevgeny Vapnik and Mikhail Murashko
*E-mail: irina.galuskina@us.edu.pl
New structure type
Monoclinic: P21/c; structure determined
a = 11.2450(8), b = 9.0963(5), c = 14.068(1) Å, β = 113.237(8)°
10.311(81), 5.455(59), 3.833(100), 3.408(42), 3.215(34), 2.952(67), 2.908(55), 2.661(57)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5298/1
How to cite: Galuskina, I.O., Krüger, B., Galuskin, E.V., Vapnik, Y. and Murashko, M. (2019) Khurayyimite, IMA 2018-140. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical Magazine, 83, xxx-xxx.

IMA No. 2018-147
Polekhovskyite
MoNiP2
Halamish wadi, southern part of the Hatrurim Formation, Negev Desert, Israel (31°09’47”N, 35°17’57”E)
Sergey N. Britvin*, Mikhail N. Murashko, Oleg S. Vereshchagin, Yevgeny Vapnik, Vladimir V. Shilovskikh and Natalia S. Vlasenko
*E-mail: sbritvin@gmail.com
Known synthetic analogue
Hexagonal: P63/mmc; structure determined
a = 3.330(1), c = 11.227(4) Å
5.614(4), 2.884(71), 2.807(14), 2.793(9), 2.565(8), 2.011(100), 1.665(35), 1.432(9)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5287/1
How to cite: Britvin, S.N., Murashko, M.N., Vereshchagin, O.S., Vapnik, Y., Shilovskikh, V.V. and Vlasenko, N.S. (2019) Polekhovskyite, IMA 2018-147. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical Magazine, 83, xxx-xxx.

IMA No. 2018-150
Siwaqaite
Ca6Al2(CrO4)3(OH)12·26H2O
North Siwaqa complex, Lisdan-Siwaqa Fault, Hatrurim Complex, ca. 60 km S of Amman, Jordan (31°24’15”N, 36°14’34”E)
Rafał Juroszek*, Biljana Krüger, Irina O. Galuskina, Hannes Krüger, Yevgeny Vapnik and Evgeny V. Galuskin
*E-mail: rjuroszek@us.edu.pl
The Cr analogue of ettringite
Trigonal: P31c; structure determined
a = 11.3640(2), c = 21.4485(2) Å
9.841(100), 5.682(65), 5.021(16), 4.709(38), 3.900(29), 3.280(17), 3.279(33), 2.224(16)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5277/1
How to cite: Juroszek, R., Krüger, B., Galuskina, I.O., Krüger, H., Vapnik, Y. and Galuskin, E.V. (2019) Siwaqaite, IMA 2018-150. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical Magazine, 83, xxx-xxx.

IMA No. 2018-151
Mangani-pargasite
NaCa2(Mg4Mn3+)(Si6Al2)O22(OH)2
Långban deposit, Filipstad district, Värmland, Bergslagen ore province, Sweden (59.86°N, 14.26°E)
Ulf Hålenius*, Ferdinando Bosi and Erik Jonsson
E-mail: ulf.halenius@nrm.se
Amphibole supergroup
Monoclinic: C2/m; structure determined
a = 9.9448(5), b = 18.0171(9), c = 5.2829(3) Å, β = 105.445(2)°
8.42(29), 3.28(49), 3.14(100), 2.82(44), 2.70(21), 1.904(29), 1.650(22), 1.448(46)
Type material is deposited in the mineralogical collections of the Department of Geosciences, Swedish Museum of Natural History, Box 50007, SE-10405 Stockholm, Sweden, collection number NRM20100001
How to cite: Hålenius, U., Bosi, F. and Jonsson, E. (2019) Mangani-pargasite, IMA 2018-151. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical Magazine, 83, xxx-xxx.

IMA No. 2018-152
Natromarkeyite
Na2Ca8(UO2)4(CO3)13·27H2O
Markey mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°32’57”N, 110°18’08”W)
Anthony R. Kampf*, Travis A. Olds, Jakub Plášil, Joe Marty and Peter C. Burns
E-mail: akampf@nhm.org
Chemically and structurally related to markeyite
Orthorhombic: Pmmn; structure determined
a = 17.882(1), b = 18.3030(4), c = 10.2249(3) Å
10.21(88), 6.40(92), 5.43(100), 5.07(42), 4.141(55), 4.009(42), 2.975(36), 2.726(31)
Type material is deposited in the mineralogical collections of the Natural History Museum of Los
Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 67487
(holotype) and 67488 (cotype)
How to cite: Kampf, A.R., Olds, T.A., Plášil, J., Marty, J. and Burns, P.C. (2019) Natromarkeyite,
IMA 2018-152. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical Magazine, 83,
xxx-xxx.

IMA No. 2018-074a
Bohuslavite
Fe3+4(PO4)3(SO4)(OH)·nH2O (15 ≤ n ≤ 24)
Buca della Vena mine, Stazzema, Apuan Alps, Lucca Province, Tuscany, Italy (43°59’55”N,
10°18’37”E – type locality); Horní Město deposit, near Rýmařov, northern Moravia, Czech
Republic (cotype locality)
Daniela Mauro, Cristian Biagioni*, Elena Bonaccorsi, Ulf Hålenius, Marco Pasero, Henrik
Skogby, Federica Zaccarini, Jiří Sejkora, Jakub Plášil, Anthony R. Kampf, Jan Filip, Pavel
Novotný and Radek Škoda
*E-mail: cristian.biagioni@unipi.it
New structure type
Triclinic: P1; structure determined
a = 13.376(3), b = 13.338(3), c = 10.863(4) Å, α = 92.80(2), β = 91.03(2), γ = 119.92(2)°
11.34(100), 8.01(13), 5.71(14), 5.14(10), 4.359(16), 4.210(9), 4.094(7), 3.210(8)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale,
Università di Pisa, Via Roma 79, Calci (Pisa), Italy, catalogue number 19899 (Buca della Vena),
the Department of Mineralogy and Petrology, National Museum Prague, Cirkusová 1740, CZ-193
00 Praha 9, Czech Republic, catalogue number P1P 1/2018 (Horní Město), and the Natural
History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007,
USA, catalogue number 66768 (Horní Město)
How to cite: Mauro, D., Biagioni, C., Bonaccorsi, E., Hålenius, U., Pasero, M., Skogby, H.,
Zaccarini, F., Sejkora, J., Plášil, J., Kampf, A.R., Filip, J., Novotný, P. and Škoda, R. (2019)
Bohuslavite, IMA 2018-074a. CNMNC Newsletter No. 48, April 2019, page xxx; Mineralogical
Magazine, 83, xxx-xxx.

NOMENCLATURE PROPOSALS APPROVED IN JANUARY 2019

IMA 18-J: Redefinition of samarskite (Y)
The proposal 18-J is accepted. According to new structural data, samarskite-(Y) shows a cation
ordering, leading to the end-member formula YFe3+Nb2O8.
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IMA 2016-051 = chirvinskyite (1 reply)

April 7, 2019, 3:36 am
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Reference:
▪ Yakovenchuk, V.N., Pakhomovsky, Y.A., Panikorovskii, T.L., Zolotarev, A.A., Mikhailova, J.A., Bocharov, V.N., Krivovichev, S.V., Ivanyuk, G.Yu. (2019): Chirvinskyite, (Na,Ca)13(Fe,Mn,□)2(Ti,Nb)2(Zr,Ti)3-(Si2O7)4(OH,O,F)12, a New Mineral with a Modular Wallpaper Structure, from the Khibiny Alkaline Massif (Kola Peninsula, Russia). Minerals, 9, 219; https://doi.org/10.3390/min9040219

Abstract
Chirvinskyite, (Na,Ca)13(Fe,Mn,□)2(Ti,Nb)2(Zr,Ti)3(Si2O7)4(OH,O,F)12, is a new wöhlerite–related zirconotitano–sorosilicate. It is triclinic, P1, a = 7.0477(5), b = 9.8725(5), c = 12.2204(9) Å, α = 77.995(5), β = 82.057(6), γ = 89.988(5)°, V = 823.35(9) Å3, Z = 1. The mineral was found in albitized alkaline pegmatites in a foyaite of the Mt. Takhtarvumchorr (Khibiny alkaline massif, Kola Peninsula, Russia, N 67°40’, E 33°33’). Chirvinskyite forms sheaf–like and radiated aggregates (up to 6 mm in diameter) of split fibrous crystals hosted by saccharoidal fluorapatite and albite. The mineral is pale cream in color, with a silky luster and a white streak. The cleavage is not recognized. Mohs hardness is 5. Chirvinskyite is biaxial (–), α 1.670(2), β 1.690(2), γ 1.705(2) (589 nm), 2Vcalc = 80.9°. The calculated and measured densities are 3.41 and 3.07(2) g·cm−3, respectively. The empirical formula based on Si = 8 apfu is (Na9.81Ca3.28K0.01)∑13.10(Fe0.72Mn0.69□0.54Mg0.05)∑2.00(Ti1.81Nb0.19)∑2.00(Zr2.27Ti0.63)∑2.90(Si2O7)4{(OH)5.94O3.09F2.97}∑12.00. Chirvinskyite belongs to a new structure type of minerals and inorganic compounds and is related to the wöhlerite-group minerals. Its modular “wallpaper” structure consists of disilicate groups Si2O7 and three types of “octahedral walls”. The mineral is named in honor of Petr Nikolaevich Chirvinsky (1880–1955), Russian geologist and petrographer, head of the Petrography Department of the Perm’ State University (1943–1953), for his contributions to mineralogy and petrology, including studies of the Khibiny alkaline massif.
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IMA 2013-107 = zuktamrurite (2 replies)

April 10, 2019, 1:57 am
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Reference:
▪ Britvin, S.N., Murasko, M.N., Vapnik, Y., Polekhovsky, Y.S., Krivovichev, S.V., Vereshchagin, O.S., Vlasenko, N.S., Shilovskikh, V.V., Zaitsev, A.N. (2019): Zuktamrurite, FeP2, a new mineral, the phosphide analogue of löllingite, FeAs2. Physics and Chemistry of Minerals, 46, 361–369.

Abstract:
Zuktamrurite, FeP2, is a new mineral, a natural iron diphosphide found in the pyrometamorphic rocks of the Hatrurim Formation, in the southern part of the Negev Desert, Israel and on the Transjordan Plateau, Jordan. The mineral occurs as irregular grains up to 50 µm in size associated with murashkoite, FeP, and barringerite, (Fe,Ni)2P. In reflected light, zuktamrurite is white with a distinct bluish tint. It is non-pleochroic but exhibits distinct anisotropy in bluish colours. Reflectance values for the IMA COM recommended wavelengths are [Rmax/Rmin, % (λ, nm)]: 50.40/47.20 (470); 49.16/46.23 (546); 48.97/46.16 (589); 49.40/46.40 (650). It is brittle. Electron microprobe analysis of the holotype specimen gave the following chemical composition (wt%, average of 5 points): Fe 40.23; Ni 7.97; P 51.70; total 99.90. The empirical formula calculated on the basis of 3 apfu is (Fe0.86Ni0.16)1.02P1.98 corresponding to FeP2. Zuktamrurite is orthorhombic, space group Pnnm, unit cell parameters refined from the single-crystal data: a 4.9276(6), b 5.6460(7), c 2.8174(4) Å, V 78.38(1) Å3, Z = 2. Dx = 5.003 g cm−3. The crystal structure was solved and refined to R1 = 0.0121 on the basis of 109 unique reflections with I > 2σ(I). The strongest lines of the powder X-ray diffraction pattern [(d, Å) (I, %) (hkl)]: 3.714 (54) (110); 2.820 (31) (020); 2.451 (100) (120, 101); 2.242 (55) (111); 1.760 (37) (211). The mineral is named for the Zuk-Tamrur cliff (Dead Sea) located nearby the type locality, the Halamish Wadi, southern Negev Desert, Israel. Zuktamrurite is the phosphide analogue of löllingite (loellingite), FeAs2. It is the most phosphorus-rich phosphide ever found in nature.
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IMA 2018-039 = meyrowitzite (no replies)

April 12, 2019, 4:58 am
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Reference:
▪ Kampf, A.R., Plášil, J., Olds, T.A., Nash, B.P., Marty, J., Belkin, H.E. (2019): Meyrowitzite, Ca(UO2)(CO3)2·5H2O, a new mineral with a novel uranyl-carbonate sheet. American Mineralogist, 104, 603-610.

Abstract:
Meyrowitzite, Ca(UO2)(CO3)2·5H2O, is a new mineral species from the Markey mine, Red Canyon, San Juan County, Utah, U.S.A. It is a secondary phase found on calcite-veined asphaltum in association with gypsum, markeyite, and rozenite. Meyrowitzite occurs as blades up to about 0.2 mm in length, elongate on [010], flattened on {100}, and exhibiting the forms {100}, {001}, {101}, {110}, and {011}. The mineral is yellow and transparent with vitreous luster and very pale yellow streak. Fluorescence under a 405 nm laser is from weak greenish yellow to moderate greenish blue. The Mohs hardness is ca. 2, tenacity is brittle, fracture is irregular, and there is one perfect cleavage, {101}. The measured density is 2.70(2) g/cm3. The mineral is optically biaxial (+) with α = 1.520(2), β = 1.528(2), and γ = 1.561(2) (white light). The 2V(meas) = 53.0(6)°; weak dispersion, r > v; optical orientation: Z = b, Y ^ a ≈ 19° in obtuse β; pleochroism pale yellow, X ≈ Y < Z. Electron microprobe analyses provided the empirical formula Ca0.94(U1.00O2)(CO3)2·5(H2.02O) on the basis of U = 1 and O = 13 apfu, as indicated by the crystal structure determination. Meyrowitzite is monoclinic, P21/n, a = 12.376(3), b = 16.0867(14), c = 20.1340(17) Å, β = 107.679(13)°, V = 3819.3(12) Å3, and Z = 12. The structure (R1 = 0.055 for 3559 Io > 2σI) contains both UO7 pentagonal bipyramids and UO8 hexagonal bipyramids, the latter participating in uranyl tricarbonate clusters (UTC). The two kinds of bipyramids and the carbonate groups link to form a novel corrugated heteropolyhedral sheet. This is the first structural characterization of a uranyl-carbonate mineral with a U:C ratio of 1:2. Meyrowitzite is apparently dimorphous with zellerite.
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Discovery of the first natural hydride (8 replies)

April 13, 2019, 3:01 am
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Reference:
▪ Bindi, L., Cámara, F., Griffin, W.L., Huang, J.-X., Gain, S.E.M., Toledo, V., O’Reilly, S. (2019): Discovery of the first natural hydride. American Mineralogist, 104, 611–614.

Abstract:
Although hydrogen is the most abundant element in the solar system, the mechanisms of exchange of this element between the deep interior and surface of Earth are still uncertain. Hydrogen has profound effects on properties and processes on microscopic-to-global scales. Here we report the discovery of the first hydride (VH2) ever reported in nature. This phase has been found in the ejecta of Cretaceous pyroclastic volcanoes on Mt Carmel, N. Israel, which include abundant xenoliths containing highly reduced mineral assemblages. These xenoliths were sampled by their host magmas at different stages of their evolution but are not genetically related to them. The xenoliths are interpreted as the products of extended interaction between originally mafic magmas and CH4+H2 fluids, derived from a deeper, metal-saturated mantle. The last stages of melt evolution are recorded by coarse-grained aggregates of hibonite (CaAl12O19) + grossite (CaAl4O7) + V-rich spinels ± spheroidal to dendritic inclusions of metallic vanadium (V0), apparently trapped as immiscible metallic melts. The presence of V0 implies low oxygen fugacities and suggests crystallization of the aggregates in a hydrogen-rich atmosphere. The presence of such reducing conditions in the upper mantle has major implications for the transport of carbon, hydrogen and other volatile species from the deep mantle to the surface.
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IMA 2018-156 = tsikourasite (no replies)

April 25, 2019, 3:35 am
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Reference:
▪ Zaccarini, F., Bindi, L., Ifandi, E., Grammatikopoulos, T., Stanley, C., Garuti, G., Mauro, D. (2019): Tsikourasite, Mo3Ni2P1+x (x < 0.25), a New Phosphide from the Chromitite of the Othrys Ophiolite, Greece. Minerals, 9, 248; https://doi.org/10.3390/min9040248

Abstract:
Tsikourasite, Mo3Ni2P1+x (x < 0.25), is a new phosphide discovered in a mantle-hosted podiform chromitite collected in the abandoned mine of Agios Stefanos (Othrys ophiolite), Central Greece. It forms tiny grains (from a few μm up to about 80 μm) and occurs as isolated grains or associated with other known minerals such as nickelphosphide and awaruite, and with undetermined minerals such as Ni-allabogdanite or Ni-barringerite and a V-sulphide. Tsikourasite is brittle and has a metallic luster. In plane-polarized light, tsikourasite is white yellow and it shows no bireflectance, anisotropism or pleochroism. Internal reflections were not observed, Reflectance values of tsikourasite in air (R in %) are: 55.7 at 470 nm, 56.8 at 546 nm, 57.5 at 589 nm and 58.5 at 650 nm. Five spot analyses of tsikourasite give the average composition: P 7.97, S 0.67, V 14.13, Fe 14.37, Co 7.59, Ni 23.9, and Mo 44.16, total 99.60 wt%, corresponding to the empirical formula (Mo1.778V1.071Fe0.082Co0.069)Σ3.000(Ni1.572Co0.428)Σ2.000(P0.981S0.079)Σ1.060, on the basis of Σ(Mo +V + Fe + Co + Ni) = 5 apfu and taking into account the structural results. The simplified formula is Mo3Ni2P1+x (x < 0.25). The density, which was calculated based on the empirical formula and single-crystal data, is 9.182 g/cm3. The mineral is cubic, space group F-43m, with a = 10.8215(5) Å and Z = 16. Although tsikourasite is similar in composition to those of monipite (MoNiP), polekhovskyite (MoNiP2), and the synthetic compound MoNiP2, all these phases are hexagonal and not cubic like tsikourasite. It exhibits the same structure as the cubic Mo3Ni2P1.18 compound [space group F-43m, a = 10.846(2) Å] synthesized at 1350 °C. The mineral and its name have been approved by the Commission of New Minerals, Nomenclature and Classification of the International Mineralogical Association (No. 2018-156). The mineral honors Professor Basilios Tsikouras of the Universiti Brunei Darussalam.
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IMA 2016-102 = giftgrubeite (no replies)

May 14, 2019, 2:54 am
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Reference:
▪ Meisser, N., Plášil, J., Brunsperger, T., Lheur, C., Škoda, R. (2019): Giftgrubeite, CaMn2Ca2(AsO4)2(AsO3OH)2·4H2O, a new member of the hureaulite group from Sainte-Marie-aux-Mines, Haut-Rhin Department, Vosges, France. Journal of Geosciences, 64, 73-80.

Abstract:
Giftgrubeite, ideally CaMn2Ca2(AsO4)2(AsO3OH)2·4H2O, is a new mineral occurring at the Giftgrube Mine, St Jacques vein, Rauenthal, Sainte-Marie-aux-Mines, Haut-Rhin Department, Grand Est, France and named after the type-locality. Giftgrubeite is mostly associated with Mn-bearing calcite, native arsenic, löllingite, and picropharmacolite. It is a recent secondary mineral, formed by alteration of the arsenical vein minerals after mining. Giftgrubeite occurs in colorless, rarely pearl white to pale yellow rosettes of brittle tabular crystals flattened on {1 0 0} and up to 0.2 mm in size. Hardness (Mohs) is 3 ½, Dmeas is 3.23(2) g·cm–3, Dcalc is 3.24 g·cm–3. The new mineral is biaxial negative without pleochroism. Measured 2V angle is ~72° and calculated 2V angle is 75.1°; the refractive indices measured in white light are: α = 1.630(2), β = 1.640(2) and γ = 1.646(2). The most prominent Raman bands are at 902, 885, 864, 851, 824, 797 and 759 cm–1. The empirical chemical formula is (Ca3.04Mn1.30Mg0.38Fe0.28)Σ5.00(AsO4)1.99(AsO3OH)2·4H2O. Giftgrubeite is monoclinic, C2/c, Z = 4, with a = 18.495(7) Å, b = 9.475(4) Å, c = 9.986(4) Å, β = 96.79(3)° and V = 1737.7(12) Å3. The six strongest lines in the X-ray powder diffraction pattern are [d in Å (I)(hkl)]: 3.33 (100)(–2 2 2), 3.18 (80)(2 2 2), 2.414 (60)(7 1 1), 4.80 (50)(–3 1 1), 4.65 (50)(–2 0 2) and 3.05 (50)(1 1 3). The structure of giftgrubeite was solved from the crystal retrieved from the type specimen by the charge-flipping algorithm. Giftgrubeite contains a well-known structure type parent to the hureaulite group of minerals, which is based upon an octahedral edge-sharing pentamers of M2+-polyhedra, pentamers linked into a loose framework by sharing corners with octahedra in adjacent pentamers and further by AsO4 and AsO3OH tetrahedra. There are three distinct octahedral sites: M1, M2, and M3. In the case of giftgrubeite, two of the M sites were found to be fully occupied by Ca; namely M1 and M3. The M2 site was then found to contain Mg besides dominant Mn. Considering the refined site occupancies, the structural formula for giftgrubeite is Ca3Mn1.30Mg0.70(AsO4)2(AsO3OH)2(H2O)4. Giftgrubeite is an ordered intermediate member between villyaellenite, MnMn2Ca2(AsO3OH)2(AsO4)2·4H2O and sainfeldite, CaCa2Ca2(AsO4)2(AsO3OH)2·4H2O.
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IMA 2018-029 = gaildunningite (no replies)

May 22, 2019, 12:57 am
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Reference:
▪ Hawthorne, F.C., Cooper, M.A., Roberts, A.C., Stanley, C.J., Spratt, J., Christy, A.G. (2019): Gaildunningite, ideally Hg2+3[NHg2+2]18(Cl,I)24, a new mineral from the Clear Creek mine, San Benito County, California, USA: description and crystal structure. Canadian Mineralogist, 57, 295-310.

Abstract:
Gaildunningite, ideally Hg2+3[NHg2+2]18(Cl,I)24, is a new mineral from the Clear Creek mine, New Idria mining district, San Benito County, California, USA. It is orthorhombic, space group Amam, Z = 4; a 26.381(6), b 45.590(10), c 6.6840(15) Å, V 8039(5) Å3. Chemical analysis by electron microprobe gave Hg 76.87, I 12.55, Cl 3.79, Br 0.56, S 0.18 wt.%; N 2.45, O 0.28, and H 0.02 wt.% were derived from the crystal structure to give a total of 96.70 wt.%. The empirical formulae (calculated on the basis of 39.44 Hg with 18 N and OH added to give electroneutrality) is Hg2+39.44N18[Cl11.00I10.18(OH)1.81Br0.73S0.58]Σ24.30 and the simplified formula is Hg2+3[NHg2+2]18(Cl,I)24. The seven strongest lines in the X-ray powder diffraction pattern [listed as d (Å), I, (hkl)] are as follows: 2.853, 100, (880, 0.16.0); 2.776, 100, (462, 5.14.0); 2.745, 100, (542); 5.717, 50, (440, 080); 5.965, 40, (131); 5.018, 40, (331); 1.673, 40, (004). Gaildunningite generally forms complex parallel intergrowths of fibrous to acicular crystals elongated along [001]. Acicular yellow to orange to darker orange-red crystals up to 0.1 mm long form matted nests lining vugs within white-grey quartz. Gaildunningite has a vitreous to adamantine luster, is transparent, and does not fluoresce under short- or long-wave ultraviolet light. Mohs hardness ≈ 3 and the calculated density is 8.22 g/cm3. It is brittle with an uneven fracture and has very good cleavage on {100} and {010} and good cleavage on {001}; neither parting nor twinning was observed. It is grey in reflected light with possibly minor bireflectance but no reflectance pleochroism, and strong yellow-orange internal reflections are evident even in plane-polarized light. The Raman spectrum indicates the presence of Hg–N bonds in the structure. The crystal structure of gaildunningite is based on a well-ordered three-dimensional [NHg2]+ net of near-linear N–Hg–N groups, where each N3– is tetrahedrally coordinated by Hg2+. The net is comprised of two five-membered, three six-membered, one seven-membered, and one eight-membered rings of N–Hg–N groups. The interstitial part of the structure is significantly disordered and consists of (Hg2+) and (I–,Cl–,Br–,S2–,OH–) ions. A new bond-valence parameter has been derived for (Hg2+–N3–) bonds: Ro = 1.964 Å, b = 0.37; this gives bond-valence sums at the N3– ions in accord with the valence-sum rule.
Gaildunningite and unnamed CCUK-18 are the only (Hg-N-I)-bearing minerals discovered at Clear Creek to date and are closely associated; gaildunningite is the later of these two minerals and tends to grow on CCUK-18. They post-date the iodine-free nitride mosesite and the (N,I)-free chlorides such as eglestonite, implying that iodine was a late addition to the overall chemical system. Both the mineral and the mineral name have been approved by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA 2018–029). The mineral is named after Gail E. Dunning (b. 1937), a prominent field-collector of minerals from the New Idria mining district who has been responsible for the discovery of many new mercury-bearing minerals.
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IMA 2017-118 = jahnsite-(MnMnMg) (1 reply)

May 22, 2019, 2:45 am
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Reference:
▪ Vignola, P., Hatert, F., Baijot, M., Rotiroti, N., Risplendente, A., Varvello, S. (2019): Jahnsite-(MnMnMg), Mn2+Mn2+Mg2+2Fe3+2(PO4)4(OH)2·8H2O, a New Phosphate Mineral Species from Sapucaia Pegmatite, Sapucaia Do Norte, GalilÉia, Minas Gerais, Brazil. [i]Canadian Mineralogist[/i], [b]57[/b], 363-370.

Abstract:
Jahnsite-(MnMnMg), Mn2+Mn2+Mg2+2Fe3+2(PO4)4(OH)2·8H2O, is a new phosphate mineral belonging to the jahnsite subgroup contained in the jahnsite group of minerals. It was found in the dumps of the Sapucaia pegmatite, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil by one of the authors (SV). The mineral occurs on the surfaces of hydrothermal cavities and is associated with frondelite, mangangordonite, and leucophosphite. It forms prisms weakly elongated along a, flattened on [010], and twinned by reflection on {001} up to 200 μm in length. The new species is a late stage alteration product of primary phosphates such as triphylite. Its color is yellow to honey-colored or greenish-yellow and it is partially transparent with a vitreous luster. The streak is very pale yellow. Jahnsite-(MnMnMg) is brittle with good cleavage on {001} and irregular fracture. Its inferred Mohs hardness is 4 and the calculated density is 2.625 g/cm3. The mineral is optically biaxial (–) with α = 1.616, β = 1.619, γ = 1.656 and 2V (calc.) = 74° and non-fluorescent under 254 nm (short wave) and 366 nm (long wave). The empirical formula is: (Mn0.50Ca0.25Na0.20)Σ0.95Mn(Mg1.26Mn0.52Fe2+0.21Zn0.01)Σ2(Fe3+1.63Al0.37)Σ2(PO4)4(OH)1.70·8H2O. The endmember formula is Mn2+Mn2+Mg2+2Fe3+2(PO4)4(OH)2·8H2O. Jahnsite-(MnMnMg) is monoclinic, with space group P2/a and unit-cell parameters a 15.177(2) Å, b 7.176(1) Å, c 10.006(3) Å, and β 110.01(2)° with V 1017.3(2) Å3 for Z = 2. Its crystal structure was refined and the mineral is isostructural with other members of the jahnsite group.
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New mineral luxembourgite (2 replies)

May 23, 2019, 9:44 am
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New minerals and nomenclature approved by IMA CNMNC in April and May 2019 (4 replies)

May 24, 2019, 9:15 am
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NEW MINERAL PROPOSALS APPROVED IN APRIL 2019

IMA No. 2018-141
Andymcdonaldite
Fe2TeO6
Wildcat prospect, NW portion of the Detroit District, Juab Co., Utah, USA
Mati Raudsepp*, Mark F. Coolbaugh, John K. McCormack, Edith Czech and Rhy McMillan
*E-mail: mraudsepp@eoas.ubc.ca
Known synthetic analogue
Tetragonal: P42/mnm
a = 4.6222(9), c = 9.077(3) Å
4.538(12), 4.119(35), 3.268(100), 2.652(10), 2.531(58), 2.311(13), 1.707(48), 1.634(14)
Type material is deposited in the mineralogical collections of the Smithsonian National Museum of Natural History, 10th St. & Constitution Ave., Washington, DC 20560, USA, catalogue number NMNH 177134
How to cite: Raudsepp, M., Coolbaugh, M.F., McCormack, J.K., Czech, E. and McMillan, R. (2019) Andymcdonaldite, IMA 2018-141. CNMNC Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2018-142
Aluminosugilite
KNa2Al2Li3Si12O30
Cerchiara mine, Faggiona, Borghetto Vara-Pignone,
La Spezia, Liguria, Italy (44°11’57”N, 9°42’1”E)
Mariko Nagashima*, Chihiro Fukuda, Takashi
Matsumoto, Teruyoshi Imaoka, Gianluca Odicino
and Gianluca Armellino
*E-mail: nagashim@yamaguchi-u.ac.jp
Osumilite group
Hexagonal: P6/mcc; structure determined
a = 9.9830(4), c = 13.9667(5) Å
4.32(100), 4.06(38), 3.67(14), 3.48(30), 3.18(92),
2.86(70), 2.71(18), 2.49(18)
Type material is deposited in the mineralogical
collections of the National Museum of Nature and
Science, Tsukuba, Japan, specimen numbers NSMMF-
16503
How to cite: Nagashima, M., Fukuda, C., Matsumoto,
T., Imaoka, T., Odicino, G. and Armellino, G. (2019)
Aluminosugilite, IMA 2018-142. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323-xxx.

IMA No. 2018-150
Siwaqaite
Ca6Al2(CrO4)3(OH)12·26H2O
North Siwaqa complex, Lisdan-Siwaqa Fault,
Hatrurim Complex, ca. 60 km S of Amman, Jordan
(31°24’15”N, 36°14’34”E)
Rafał Juroszek*, Biljana Krüger, Irina O. Galuskina,
Hannes Krüger, Yevgeny Vapnik and Evgeny V.
Galuskin
*E-mail: rjuroszek@us.edu.pl
The Cr analogue of ettringite
Trigonal: P31c; structure determined
a = 11.3640(2), c = 21.4485(2) Å
9.841(100), 5.682(65), 5.021(16), 4.709(38),
3.900(29), 3.280(17), 3.279(33), 2.224(16)
Type material is deposited in the collections of the
Fersman Mineralogical Museum, Russian Academy
of Sciences, Leninskiy Prospekt 18-2, Moscow
119071, Russia, registration number 5277/1
How to cite: Juroszek, R., Krüger, B., Galuskina,
I.O., Krüger, H., Vapnik, Y. and Galuskin, E.V.
(2019) Siwaqaite, IMA 2018-150. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2018-154
Luxembourgite
AgCuPbBi4Se8
Bivels, Luxembourg (49°57’8”N, 6°10’41”E)
Simon Philippo, Frédéric Hatert*, Yannick Bruni and
Pietro Vignola
*E-mail: fhatert@uliege.be
Isostructural with watkinsonite and litochlebite
Monoclinic: P21/m; structure determined
a = 13.002(1), b = 4.1543(3), c = 15.312(2) Å, β =
108.92(1)°
4.61(20), 3.59(20), 2.984(100), 2.425(20), 2.085(60),
1.916(20), 1.355(30), 1.188(30)
Type material is deposited in the mineralogical
collections of the Natural History Museum of
Luxembourg, Rue Münster 25, L-2560 Luxembourg,
Luxembourg, catalogue number FD040, and the
Laboratory of Mineralogy, University of Liège,
Bâtiment B18, Sart Tilman, B-4000 Liège, Belgium,
catalogue number 21302
How to cite: Philippo, S., Hatert, F., Bruni, Y. and
Vignola, P. (2019) Luxembourgite, IMA 2018-154.
CNMNC Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2018-156
Tsikourasite
Mo3Ni2P1+x (x < 0.25)
Agios Stefanos mine, ca. 10 km S of the Domokos
village, Othrys ophiolite, Greece (39°4’59”N,
22°25’59”E)
Federica Zaccarini*, Luca Bindi, Elena Ifandi, Tassos
Grammatikopoulos, Chris J. Stanley, Giorgio Garuti
and Daniela Mauro
*E-mail: Federica.Zaccarini@unileoben.ac.at
Known synthetic analogue
Cubic: F 4 3m; structure determined
a = 10.8215(5) Å
2.705(20), 2.483(18), 2.209(65), 2.083(100),
1.913(32), 1.803(12), 1.275(26), 1.089(12)
Type material is deposited in the mineralogical
collections of the Museo di Storia Naturale,
Università di Firenze, Via La Pira 4, I-50121,
Firenze, Italy, catalogue number 3296/I
How to cite: Zaccarini, F., Bindi, L., Ifandi, E.,
Grammatikopoulos, T., Stanley, C.J., Garuti, G. and
Mauro, D. (2019) Tsikourasite, IMA 2018-156.
CNMNC Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2018-157
Laurentthomasite
Mg2K(Be2Al)Si12O30
40 km E of the village of Betroka, in a rural
area named Beravina, close to the small village of
Ambaro, Toliara province, Madagascar (23°21’0”S,
46°25’0”E)
Cristiano Ferraris*, Isabella Pignatelli, Fernando
Cámara, Sylvain Ponti, Martin Schreyer, Gian Carlo
Parodi and Fengxia Wei
*E-mail: ferraris@mnhn.fr
The Mg analogue of milarite
Hexagonal: P6/mcc; structure determined
a = 9.95343(6), c = 14.15583(8) Å
7.055(2), 4.965(6), 4.302(2), 4.064(8), 3.533(3),
3.171(10), 2.881(8), 2.372(4)
Type material is deposited in the mineralogical
collections of the Muséum National d’Histoire
Naturelle, 61 rue Buffon, 75005 Paris, France,
catalogue numbers 218.1_a (holotype), 218.1_b and 218.1_c (cotypes)
How to cite: Ferraris, C., Pignatelli, I., Cámara, F., Ponti, S., Schreyer, M., Parodi, G.C. and Wei, F. (2019) Laurentthomasite, IMA 2018-157. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-158
Kahlenbergite
KAl11O17
Ca. 300 m NE of the Parsa Mt, Negev Desert, Hatrurim Basin, Israel (31°12.18’N, 36°15.31’E)
Biljana Krüger*, Evgeny V. Galuskin, Irina O. Galuskina, Hannes Krüger and Yevgeny Vapnik
*E-mail: biljana.krueger@uibk.ac.at
The K analogue of diaoyudaoite
Hexagonal: P63/mmc; structure determined
a = 5.64860(6), c = 22.8970(3) Å
11.448(100), 5.724(15), 2.824(14), 2.719(34), 2.533(26), 2.059(12), 1.610(13), 1.412(19)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5295/1
How to cite: Krüger, B., Galuskin, E.V., Galuskina, I.O., Krüger, H. and Vapnik, Y. (2019) Kahlenbergite, IMA 2018-158. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-159
Scorticoite
Mn6(Sb☐)Σ2(SiO4)2O3(OH)3
Scortico Mn ore deposit, Fivizzano, Apuan Alps, Massa Carrara, Tuscany, Italy (44°07’39”N, 10°07’12”E)
Cristian Biagioni*, Elena Bonaccorsi, Anthony R. Kampf, Federica Zaccarini, Ulf Hålenius and Ferdinando Bosi
*E-mail: cristian.biagioni@unipi.it
Welinite group
Trigonal: P3; structure determined
a = 8.205(1), c = 4.774(1) Å
3.105(s), 2.858(s), 2.676(ms), 2.332(ms), 1.787(s), 1.685(m), 1.552(m)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci, Pisa, Italy, catalogue number 19908
How to cite: Biagioni, C., Bonaccorsi, E., Kampf, A.R., Zaccarini, F., Hålenius, U. and Bosi, F. (2019) Scorticoite, IMA 2018-159. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-160
Potassic-hastingsite
KCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
Danailingou, Tongxing town, Keshiketeng Banner, Inner Mongolia, China (43°43’18”N, 117°34’37”E)
Guangming Ren*, Guowu Li, Jiaxin Shi, Xiangping Gu, Guang Fan, Apeng Yu, Qiuxiao Liu and Ganfu Shen
*E-mail: rguangming928@sina.com
Amphibole supergroup
Monoclinic: C2/m; structure determined
a = 9.9405(7), b = 18.256(2), c = 5.3501(3) Å, β = 105.117(5)°
8.504(100), 3.417(36), 3.155(63), 2.735(71), 2.623(35), 2.570(34), 2.365(29), 2.179(30)
Type material is deposited in the mineralogical collections of the Geological Museum of China, Beijing, China, catalogue number M13815
How to cite: Ren, G., Li, G., Shi, J., Gu, X., Fan, G.,Yu, A., Liu, Q. and Shen, G. (2019) Potassic-hastingsite, IMA 2018-160. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-161
Rumoiite
AuSn2
Minamichiyoda, Shosanbetsu village, Rumoi Subprefecture, Hokkaido, Japan (44°31’21”N, 141°46’51”E)
Daisuke Nishio-Hamane* and Katsuyuki Saito
*E-mail: hamane@issp.u-tokyo.ac.jp
Known synthetic analogue
Orthorhombic: Pbca
a = 6.905(2), b = 7.017(2), c = 11.797(3) Å
4.542(58), 3.774(48), 2.950(100), 2.711(52), 2.409(41), 2.244(56), 2.136(47), 2.123(65)
Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, Tsukuba, Japan, specimen number NSM-M46178 (holotype) and M46179 (cotype)
How to cite: Nishio-Hamane, D. and Saito, K. (2019) Rumoiite, IMA 2018-161. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-162
Shosanbetsuite
Ag3Sn
Minamichiyoda, Shosanbetsu village, Rumoi Subprefecture, Hokkaido, Japan (44°31’21”N, 141°46’51”E)
Daisuke Nishio-Hamane* and Katsuyuki Saito
*E-mail: hamane@issp.u-tokyo.ac.jp
Known synthetic analogue
Orthorhombic: Pmmn
a = 5.998(5), b = 4.7736(9), c = 5.154(3) Å
2.592(10), 2.586(7), 2.389(30), 2.275(100), 2.267(85), 1.756(78), 1.356(73), 1.354(53)
Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, Tsukuba, Japan, specimen number NSM-M46178 (holotype) and M46179 (cotype)
How to cite: Nishio-Hamane, D. and Saito, K. (2019) Shosanbetsuite, IMA 2018-162. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-165
Giacovazzoite
K5Fe3+3O(SO4)6·10H2O
Monte Arsiccio mine, Stazzema (LU), Apuan Alps, Tuscany, Italy (43°58’N, 10°17’E)
Cristian Biagioni*, Luca Bindi, Daniela Mauro and Marco Pasero
*E-mail: cristian.biagioni@unipi.it
Known synthetic analogue
Monoclinic: P21/c; structure determined
a = 9.4797(2), b = 18.4454(5), c = 18.0540(4) Å, β = 92.626(2)°
9.1(s), 8.2(vs), 4.15(mw), 4.02(mw), 3.442(m), 3.371(m), 3.005(m), 2.968(m)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci, Pisa, Italy, catalogue number 19896
How to cite: Biagioni, B., Bindi, L., Mauro, D. and Pasero, M. (2019) Giacovazzoite, IMA 2018-165. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-166
Pseudomeisserite-(NH4)
(NH4)2Na4[(UO2)2(SO4)5]·4H2O
Blue Lizard mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°33’26”N, 110°17’44”W)
Anthony R. Kampf*, Travis A. Olds, Jakub Plášil, Barbara P. Nash and Joe Marty
*E-mail: akampf@nhm.org
New structure type
Monoclinic: P21/c; structure determined
a = 13.1010(3), b = 10.0948(2), c = 19.494(1) Å, β = 104.285(7)°
12.69(76), 8.88(55), 6.83(84), 6.01(100), 4.593(51), 4.414(57), 3.959(67), 3.135(76)
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 67621 and 67622
How to cite: Kampf, A.R., Olds, T.A., Plášil, J., Nash, B.P. and Marty, J. (2019) Pseudomeisserite-(NH4), IMA 2018-166. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-167
Gobelinite
CoCu4(SO4)2(OH)6·6H2O
Cap Garonne mine (pillar 78b in the north mine), Var, Provence-Alpes-Côte d’Azur, France (43°4’53”N, 6°1’55”E – type locality); Schlänger und Eichert vein of the Eisenzecher Zug mine, Eiserfeld, Siegerland, North Rhine-Westphalia, Germany (50°49’9”N, 7°59’14”E – cotype locality)
Stuart J. Mills*, Uwe Kolitsch, Georges Favreau, William D. Birch, Valérie Galea-Clolus and Johannes Markus Henrich
*E-mail: smills@museum.vic.gov.au
The Co analogue of ktenasite
Monoclinic: P21/c; structure determined
a = 5.599(1), b = 6.084(1), c = 23.676(5) Å, β = 95.22(3)°
11.870(100), 5.924(40), 4.883(10), 4.825(15), 3.946(15), 2.956(15), 2.663(20), 2.561(15)
Type material is deposited in the mineralogical collections of Geosciences, Museums Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia, registration number M54565 (Cap Garonne), and the Naturhistorisches Museum, Burgring 7, A-1010 Wien, Austria, registration number O 1045 (Eisenzecher Zug)
How to cite: Mills, S.J., Kolitsch, U., Favreau, G., Birch, W.D., Galea-Clolus, V. and Henrich, J.M. (2019) Gobelinite, IMA 2018-167. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

IMA No. 2018-108a
Fluorapophyllite-(Cs)
CsCa4(Si8O20)F(H2O)8
Darai-Pioz glacier, Alai mountain range, Tien-Shan, Rashtskii district, Tajikistan (39°30’N, 70°40’E)
Atali A. Agakhanov, Leonid A. Pautov, Anatoly V. Kasatkin, Elena Sokolova, Maxwell C. Day, Frank C. Hawthorne, Vladimir Y. Karpenko, Vyacheslav A. Muftakhov, Igor V. Pekov, Fernando Cámara Artigas and Sergey N. Britvin
*E-mail: atali99@mail.ru
Apophyllite group
Tetragonal: P4/nmc
a = 9.060(6), c = 15.741(11) Å
7.870(100), 3.935(100), 3.602(55), 2.974(84), 2.515(73), 2.486(71), 2.119(42), 2.030(45)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5280/1
How to cite: Agakhanov, A.A., Pautov, L.A., Kasatkin, A.V., Sokolova, E., Day, M.C., Hawthorne, F.C., Karpenko, V.Y., Muftakhov, V.A., Pekov, I.V., Cámara Artigas, F. and Britvin, S.N. (2019) Fluorapophyllite-(Cs), IMA 2018-108a. CNMNC Newsletter No. 49, June 2019, page xxx; Mineralogical Magazine, 83, 323–328.

NEW MINERAL PROPOSALS APPROVED IN MAY 2019

IMA No. 2019-001
Smamite
Ca2Sb(OH)4[H(AsO4)2]·6H2O
Giftgrube mine, St. Jacques vein, Rauenthal, Sainte Marie-aux-Mines, Haut-Rhin province, France (48°13’28”N, 7°9’7”E)
Jakub Plášil*, Anthony R. Kampf, Nicolas Meisser, Cédric Lheur, Thierry Brunsperger and Radek Škoda
*E-mail: plasil@fzu.cz
New structure type
Triclinic: P1; structure determined
a = 6.8207(4), b = 8.0959(4), c = 8.2130(6) Å, α =
95.834(7), β = 110.762(8), γ = 104.012(7)°
7.56(41), 6.03(60), 5.66(47), 5.07(100), 3.992(43),
3.783(36), 2.858(51), 2.766(31)
Type material is deposited in the mineralogical
collections of the Musée Cantonal de Géologie,
University of Lausanne, Anthropole, Dorigny, CH-
1015 Lausanne, Switzerland, catalogue number MGL
093481 (holotype), 093482 and 093481 (cotypes),
and the Natural History Museum of Los Angeles
County, 900 Exposition Boulevard, Los Angeles, CA
90007, USA, catalogue number 67169 (cotype)
How to cite: Plášil, J., Kampf, A.R., Meisser, N.,
Lheur, C., Brunsperger, T. and Škoda, R. (2019)
Smamite, IMA 2019-001. CNMNC Newsletter No.
49, June 2019, page xxx; Mineralogical Magazine,
83, 323–328.

IMA No. 2019-002
Caseyite
[(V5+O2)Al7.5(OH)15(H2O)13]2[H2V4+V5+9O28][V5+10O28]2·90H2O
West Sunday mine, Slick Rock district, San Miguel
Co., Colorado, USA (38°4’48.03”N,
108°49′18.07”W); Packrat mine, near Gateway, Mesa
Co., Colorado, USA (38°38’51.28”N,
109°2’49.77”W); Burro mine, Slick Rock district,
San Miguel Co., Colorado, USA (38°2’42”N,
108°53’23”W)
Anthony R. Kampf*, Mark A. Cooper, John M.
Hughes, Barbara P. Nash, Joe Marty and Frank C.
Hawthorne
*E-mail: akampf@nhm.org
New structure type
Monoclinic: P21/n; structure determined
a = 14.123(8), b = 31.00(1), c = 21.95(1) Å, β =
97.961(8)°
17.798(92), 15.499(100), 12.749(26), 12.620(33),
10.869(16), 9.332(11), 9.016(14), 8.899(43)
Type material is deposited in the mineralogical
collections of the Natural History Museum of Los
Angeles County, 900 Exposition Boulevard, Los
Angeles, CA 90007, USA, catalogue numbers 73526
(Packrat – holotype), 73527 and 73528 (Packrat –
cotypes), 73529 (West Sunday – cotype), 73530 and
73531 (Burro – cotypes)
How to cite: Kampf, A.R., Cooper, M.A., Hughes,
J.M., Nash, B.P., Marty, J. and Hawthorne, F.C.
(2019) Caseyite, IMA 2019-002. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2019-005
Langhofite
Pb2(OH)[WO4(OH)]
Långban deposit, Filipstad district, Värmland,
Sweden (59.85°N, 14.26°E, 215 m a.s.l.)
Dan Holtstam*, Fernando Cámara and Andreas Karlsson
*E-mail: dan.holtstam@nrm.se
New structure type
Triclinic: P1; structure determined
a = 6.6118(3), b = 7.0748(4), c = 7.3264(4) Å, α =
118.125(6), β = 94.503(5), γ = 101.146(5)°
6.04(24), 3.330(17), 3.259(22), 3.181(19), 3.079(24),
3.016(100), 2.053(20), 2.050(18)
Type material is deposited in the mineralogical
collections of the Department of Geosciences,
Swedish Museum of Natural History, Box 50007,
SE-104 05 Stockholm, Sweden, collection number
GEO-NRM 20030044
How to cite: Holtstam, D., Cámara, F. and Karlsson,
A. (2019) Langhofite, IMA 2019-005. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

IMA No. 2019-006
Magnanelliite
K3Fe3+2(SO4)4(OH)(H2O)2
Monte Arsiccio mine, Stazzema, Apuan Alps,
Tuscany, Italy (43°58’N, 10°17’E)
Cristian Biagioni, Luca Bindi and Anthony R. Kampf
*E-mail: cristian.biagioni@unipi.it
The Fe3+ analogue of alcaparrosaite
Monoclinic: C2/c; structure determined
a = 7.5491(3), b = 16.8652(6), c = 12.1574(4) Å, β = 94.064(1)°
6.9(m), 4.91(mw), 3.612(mw), 3.427(mw),
3.300(mw), 3.085(s), 3.006(m), 2.704(m)
Type material is deposited in the mineralogical
collections of the Museo di Storia Naturale,
Università di Pisa, Via Roma 79, Calci (Pisa, Italy),
catalogue number 19894 (holotype), and the Natural
History Museum of Los Angeles County, 900
Exposition Boulevard, Los Angeles, CA 90007,
USA, catalogue number 67241 (cotype)
How to cite: Biagioni, C., Bindi, L. and Kampf, A.R.
(2019) Magnanelliite, IMA 2019-006. CNMNC
Newsletter No. 49, June 2019, page xxx;
Mineralogical Magazine, 83, 323–328.

NOMENCLATURE PROPOSALS APPROVED IN MARCH 2019

IMA 18-C: Redefinition of calumetite and discreditation of vondechenite

Proposal 18-C is accepted, and calumetite is redefined
from Cu(OH,Cl)2·2H2O to CaCu4(OH)8Cl2·3.5H2O.
Vondechenite (IMA2016-65), identical to calumetite, is
consequently discredited.

IMA 18-I: Nomenclature of minerals of the rhodonite group

Proposal 18-I is accepted, and the rhodonite group is
established. Currently it consists of two mineral species
having the following end-member formulae: rhodonite,
M5CaM1-M3Mn3M4MnSi5O15, and ferrorhodonite M5CaM1-M3Mn3M4FeSi5O15.

IMA 19-A: Redefinition of tsugaruite

Proposal 19-A is accepted, and tsugaruite is redefined as a lead-arsenic chloro-sulfosalt, having ideal formula Pb28As15S50Cl.

NOMENCLATURE PROPOSALS APPROVED IN APRIL 2019

IMA 18-H: Redefinition of cadwaladerite and discreditation of lesukite

Proposal 18-H is accepted, demonstrating that cadwaladerite and lesukite are the same mineral species. Because cadwaladerite has historical precedence, it is recognized as a valid mineral species, whereas lesukite is discredited. Furthermore, the formula of cadwaladerite is redefined as Al5(H2O)3(OH)12·n(Cl,H2O).

IMA 18-K: Nomenclature and classification of the tetrahedrite group

Proposal 18-K on the tetrahedrite group is accepted. The general structural formula of minerals belonging to this group is M(2)A6M(1)(B4C2)Σ6X(3)D4S(1)Y12S(2)Z (Z = 2), where A = Cu+, Ag+, ☐; B = Cu+, Ag+; C = Zn2+, Fe2+, Hg2+, Cd2+, Mn2+, Cu2+, Cu+, Fe3+; D = Sb3+, As3+, Bi3+, Te4+; Y = S2-, Se2-; and Z = S2-, Se2-, ☐. The tetrahedrite group is divided into five different series on the basis of the A, B, D, and Y constituents, i.e. the tetrahedrite, tennantite, freibergite, hakite, and giraudite series. The nature of the dominant C constituent is made explicit using a hyphenated suffix between parentheses. Eleven minerals belonging to the tetrahedrite group can be considered as valid species: argentotennantite-(Zn), argentotetrahedrite-(Fe), kenoargentotetrahedrite-(Fe), giraudite-(Zn), goldfieldite, hakite-(Hg), rozhdestvenskayaite-(Zn), tennantite-(Fe), tennantite-(Zn), tetrahedrite-(Fe), and tetrahedrite-(Zn). Furthermore, annivite is formally discredited.

IMA 19-B: Establishment of the calcioferrite group

Proposal 19-B on the calcioferrite group is accepted. The general formula of minerals belonging to this group is Ca4AB4(PO4)6(OH)4·12H2O, and two subgroups are defined on the basis of the dominant cation at the B site: the calcioferrite subgroup (B = Fe3+: calcioferrite, zodacite), and the montgomeryite subgroup (B = Al: montgomeryite, kingsmountite, fanfaniite). Aniyunwiyaite is discredited as being kingsmountite, which is assigned a triclinic structure with an ideal formula changed to Ca3MnFeAl4(PO4)6(OH)4·12H2O.

NOMENCLATURE PROPOSALS APPROVED IN MAY 2019

Application of the IMA-CNMNC dominant-valency rule to complex mineral compositions

This is special proposal, coauthored by all the officers of the CNMNC and approved by the members of the Commission itself. It is aimed at solving possible troubles in the definition of the ideal end-member formula of a mineral, which may be crucial for the definition of new mineral species. The IMA-CNMNC recommends the use of the dominant-valency rule for mineral nomenclature, because it alone may lead to unambiguous mineral identification. However, the simple application of the dominant-valency rule may sometimes result in unbalanced end-member formulae, due to the occurrence of a coupled heterovalent substitution at two sites along with a heterovalent substitution at a single site. In these cases, it is recommended to use the site total charge approach to identify the dominant root-charge arrangement on which the dominant-constituent rule can be applied.
[attachment 81664 Newsletter49.pdf]
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IMA 2018-007 = dalnegorskite (no replies)

May 25, 2019, 1:53 am
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Reference:
▪ Shchipalkina, N.V., Pekov, I.V., Ksenofontov, D.A., Chukanov, N.V., Belakovskiy, D.I., Koshlyakova, N.N. (2019): Dalnegorskite, Ca5Mn(Si3O9)2, a new pyroxenoid of the bustamite structure type, a rock-forming mineral of calcic skarns of the Dalnegorskoe boron deposit (Primorskiy kray, Russia). Zapiski RMO, 148(2), 61-75.

Abstract:
Dalnegorskite — the new pyroxenoid with the crystal-chemical formula Ca2Ca2MnCa(Si3O9)2, and the simplified formula Ca5Mn(Si3O9)2, is a rock-forming mineral in the boron-bearing calcareous skarns of the Dalnegorskoe boron-silicate deposit (Dalnegorsk, Primorsky Krai, Russia). It belongs to the structural type of bustamite and forms a continuous solid-solution series with the isostructural mineral ferrobustamite Ca2Ca2FeCa[Si3O9]2. These pyroxenoids form thinly-radiated banded beige, pinkish-white and milky-white aggregates typically consisting of split thin acicular to fiber-like individuals and are associated with hedenbergite, datolite, andradite, galena, sphalerite, and pyrrhotite. Dmeas. = 3.02(2), Dcalc. = 3.035 g·cm–3. Dalnegorskite is optically biaxial, negative, α = 1.640 (3), β = 1.647 (3), γ = 1.650 (3)°, 2Vmeas. = 75(10)º. The average chemical composition of the holotype (electron microprobe data) is: MgO 0.23, CaO 40.02, MnO 5.02, FeO 3.64, SiO2 50.65, total 99.56 wt.%. The empirical formula calculated on 18 O atoms is Ca5.03Mn0.51Fe0.36Mg0.04Si6.03O18. The crystal structure of the new mineral was refined by powder X-ray diffraction data using the Rietveld method, Rp = 0.0345, Rwp = 0.0444, R1 = 0.0790, wR2 = 0.0802. Dalnegorskite is triclinic, P-1, a = 7.2588(11), b = 7.8574(15), c = 7.8765(6) Å, α = 88.550(15), β = 62.582(15), γ = 76.621(6)º, V = 386.23(11) Å3, Z = 1. Dalnegorskite is distinctly different from the related mineral wollastonite in the infrared spectrum. The wave-numbers of maxima of strong bands in the characteristic region of Si—O stretching vibrations in the IR spectrum of dalnegorskite are (cm–1): 905, 937, 1025, 1070. The type specimen of dalnegorskite is deposited in the collection of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia (No. 96201).
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IMA 2017-035 = feynmanite (no replies)

May 28, 2019, 5:46 am
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Reference:
▪ Kampf, A.R., Olds, T.A., Plášil, J., Marty, J., Perry, S.N. (2019): Feynmanite, a new sodium-uranyl-sulfate mineral from Red Canyon, San Juan County, Utah, USA. Mineralogical Magazine, 83, 153-160.

Abstract:
The new mineral feynmanite, Na(UO2)(SO4)(OH)·3.5H2O, was found in both the Blue Lizard and Markey mines, San Juan County, Utah, USA, where it occurs as a secondary phase on pyrite-rich asphaltum in association with chinleite-(Y), gypsum, goethite, natrojarosite, natrozippeite, plášilite, shumwayite (Blue Lizard) and wetherillite (Markey). The mineral is pale greenish yellow with a white streak and fluoresces bright greenish white under a 405 nm laser. Crystals are transparent with a vitreous lustre. It is brittle, with a Mohs hardness of ~2, irregular fracture and one perfect cleavage on {010}. The calculated density is 3.324 g cm–3. Crystals are thin needles or blades, flattened on {010} and elongate on [100], exhibiting the forms {010}, {001}, {101} and {10-1}, and are up to ~0.1 mm in length. Feynmanite is optically biaxial (–), with α = 1.534(2), β = 1.561(2) and γ = 1.571(2) (white light); 2Vmeas. = 62(2)°; no dispersion; and optical orientation: X = b, Y ≈ a,Z ≈ c. It is weakly pleochroic: X = colourless, Y = very pale green yellow and Z = pale green yellow (X < Y < Z). Electron microprobe analyses (WDS mode) provided (Na0.84Fe0.01)(U1.01O2)(S1.01O4)(OH)·3.5H2O. The five strongest powder X-ray diffraction lines are [dobs Å(I)(hkl)]: 8.37(100)(010), 6.37(33)(-101,101), 5.07(27)(-111,111), 4.053(46)(004,021) and 3.578(34)(120). Feynmanite is monoclinic, has space group P2/n, a = 6.927(3), b = 8.355(4), c = 16.210(7) Å, β = 90.543(4)°, V = 938.1(7) Å3 and Z = 4. The structure of feynmanite (R1 = 0.0371 for 1879 Io > 2σI) contains edge-sharing pairs of pentagonal bipyramids that are linked by sharing corners with SO4 groups, yielding a [(UO2)2(SO4)2(OH)2]2– sheet based on the phosphuranylite anion topology. The sheet is topologically identical to those in deliensite, johannite and plášilite. The dehydration of feynmanite to plášilite results in interlayer collapse involving geometric reconfiguration of the sheets and the ordering of Na.
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IMA 2017-012 = schmidite / IMA 2017-058 = wildenauerite (2 replies)

May 28, 2019, 1:34 pm
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Reference:
▪ Grey, I.E., Keck, E., Kampf, A.R., Cashion, J.D., Macrae, C.M., Glenn, A.M., Gozukara, Y. (2019): Schmidite and wildenauerite, two new schoonerite-group minerals from the Hagendorf Süd pegmatite, Oberpfalz, Bavaria. Mineralogical Magazine, 83, 181-190.

Abstract:
Schmidite, Zn(Fe3+0.5Mn2+0.5)2ZnFe3+(PO4)3(OH)3(H2O)8 and wildenauerite, Zn(Fe3+0.5Mn2+0.5)2Mn2+Fe3+(PO4)3(OH)3(H2O)8 are two new oxidized schoonerite-group minerals from the Hagendorf-Süd pegmatite, Hagendorf, Oberpfalz, Bavaria, Germany. Schmidite occurs as radiating sprays of orange brown to copper red laths on and near to altered phosphophyllite in a corroded triphylite nodule, whereas wildenauerite forms dense compacts of red laths, terminating Zn-bearing rockbridgeite. The minerals are biaxial (+) with α = 1.642(2), β = 1.680(1), γ = 1.735(2), 2V(meas) = 81.4(8)° for schmidite, and with α = 1.659(3), β = 1.687(3), γ = 1.742(3), 2V(meas) = 73(1) for wildenauerite. Electron microprobe analyses, with H2O from thermal analysis and FeO/Fe2O3 from Mössbauer spectroscopy, gave FeO 0.4, MgO 0.3, Fe2O3 23.5, MnO 9.0, ZnO 15.5, P2O5 27.6, H2O 23.3, total 99.6 wt% for schmidite, and FeO 0.7, MgO 0.3, Fe2O3 25.2, MnO 10.7, ZnO 11.5, P2O5 27.2, H2O 24.5, total 100.1 wt% for wildenauerite. The empirical formulae, scaled to 3 P and with OH- adjusted for charge balance are Zn1.47Mn2+0.98Mg0.05Fe2+0.04Fe3+2.27(PO4)3(OH)2.89(H2O)8.54 for schmidite and Zn1.11Mn2+1.18Mg0.05Fe2+0.08Fe3+2.47(PO4)3(OH)3.25(H2O)9.03 for wildenauerite. The two minerals have orthorhombic symmetry, Pmab, Z = 4. The unit-cell parameters from refinement of powder XRD data are a = 11.059(1), b = 25.452(1) and c = 6.427(1) Å for schmidite, and a = 11.082(1), b = 25.498(2) and c = 6.436(1) Å for wildenauerite. The crystal structures of schmidite and wildenauerite differ from that of schoonerite in having minor partitioning of Zn from the [5]Zn site to an adjacent vacant tetrahedral site [4]Zn, separated by ~1.0 Å from [5]Zn. The two minerals are distinguished by the cation occupancies in the octahedral M1 to M3 sites. Schmidite has M1 = M2 = (Fe3+0.5Mn2+0.5), M3 = Zn and wildenauerite has M1 = M2 = (Fe3+0.5Mn2+0.5), M3 = Mn2+.
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IMA 2017-060 = novograblenovite (2 replies)

May 28, 2019, 1:45 pm
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Reference:
▪ Okrugin, V.M., Kudaeva, S.S., Karimova, O.V., Yakubovich, O.V., Belakovskiy, D.I., Chukanov, N.V., Zolotarev, A.A., Gurzhiy, V.V., Zinovieva, N.G., Shiryaev, A.A., Kartashov, P.M. (2019): The new mineral novograblenovite, (NH4,K)MgCl3·6H2O from the Tolbachik volcano, Kamchatka, Russia: mineral information and crystal structure. MIneralogical Magazine, 83, 223-231.

Abstract:
The new mineral novograblenovite, (NH4,K)MgCl3·6H2O, was found on basaltic lava from the 2012–2013 Tolbachik fissure eruption at the Plosky Tolbachik volcano, Kamchatka Peninsula, Russia. It occurs as prismatic, needle-like transparent crystals together with gypsum and halite. Novograblenovite was formed due to the exposure of the host rocks to eruptive gas exhalations enriched in HCl and NH3. Basalt was the source of potassium and magnesium for the mineral formation. Novograblenovite crystallises in the monoclinic space group C2/c, with unit-cell parameters a = 9.2734(3) Å, b = 9.5176(3) Å, c = 13.2439(4) Å, β = 90.187(2)°, V = 1168.91(2) Å3 and Z = 4. The five strongest reflections in the powder X-ray diffraction pattern [dobs, Å (I, %) (h k l)] are: 3.330 (100) (2 2 0), 2.976 (45) (-114), 2.353 (29) (-224), 3.825 (26) (2 0 2), 1.997 (25) (-4-22). The density calculated from the empirical formula and the X-ray data is 1.504 g cm–3. The mineral is biaxial (+) with α = 1.469(2), β = 1.479(2) and γ = 1.496(2) (λ = 589 nm); 2Vmeas. = 80(10)° and 2Vcalc. = 75.7°. The crystal structure (solved and refined using single-crystal X-ray diffraction data, R1 = 0.0423) is based on the perovskite-like network of (NH4,K)Cl6-octahedra sharing chlorine vertices, and comprises [Mg(H2O)6]2+ groups in framework channels. The positions of all independent H atoms were obtained by difference-Fourier techniques and refined isotropically. All oxygen, nitrogen and chlorine atoms are involved in the system of hydrogen bonding, acting as donors or acceptors. The formula resulting from the structure refinement is [(NH4)0.7K0.3]MgCl3·6H2O. The mineral is named after Prokopiy Trifonovich Novograblenov, one of the researchers of Kamchatka Peninsula, a teacher, naturalist, geographer and geologist.
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IMA 2014-083 = agmantinite (no replies)

May 28, 2019, 6:03 am
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Reference:
▪ Keutsch, F.N., Topa, D., Takagi Fredrickson, R., Makovicky, E., Paar, W.H. (2019): Agmantinite, Ag2MnSnS4, a new mineral with a wurtzite derivative structure from the Uchucchacua polymetallic deposit, Lima Department, Peru. [i]Mineralogical Magazine[/i], [b]83[/b], 233-238.

Abstract:
Agmantinite, ideally Ag2MnSnS4, is a new mineral from the Uchucchacua polymetallic deposit, Oyon district, Catajambo, Lima Department, Peru. It occurs as orange-red crystals to 100 μm across. Agmantinite is translucent with adamantine luster and possesses a red streak. It is brittle and neither fracture nor cleavage was observed. Based on the empirical formula the calculated density is 4.574 g/cm3. On the basis of chemically similar compounds the Mohs hardness is estimated between 2 to 2 ½. In plane-polarized light agmantinite is white with red internal reflections. It is weakly bireflectant with no observable pleochroism with red internal reflections. Between crossed polars, agmantinite is weakly anisotropic with reddish brown to greenish grey rotation tints. The reflectances (Rmin and Rmax) for the four standard wavelengths are 19.7, 22.0 (470 nm), 20.5, 23.2 (546 nm), 21.7, 2.49 (589 nm), and 20.6, 23.6 (650 nm), respectively. Agmantinite is orthorhombic, space group P21nm, with unit-cell parameters: a 6.632(2), b 6.922(2), c 8.156(2) Å, V 374.41(17) Å3, a : b : c 0.958:1:1.178, Z 2. The crystal structure was refined to R = 0.0575 for 519 reflections with I > 2σ(I). Agmantinite is the first known mineral of MI2MIIMIVS4 type that is derived from wurtzite rather than sphalerite by ordered substitution of Zn, analogous to the substitution pattern for deriving stannite from sphalerite. The six strongest X-ray powder-diffraction lines derived from single-crystal XRD data [d in Å (Int.)] are: 3.51 (s), 3.32 (w), 3.11 (vs), 2.42 (w), 2.04 (m), and 1.88 (m). The empirical formula (based on 8 apfu) is (Ag1.94Cu0.03)Σ1.97(Mn0.98Zn0.05)Σ1.03Sn0.97S4.03.The crystal structure-derived formula is Ag2(Mn0.69Zn0.31)Σ1.00SnS4 and the simplified formula is Ag2MnSnS4. The name is for the composition and the new mineral and mineral name have been approved by the Commission on New Minerals, Nomenclature and Classification, IMA (2014-083).
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IMA 2016-071a = brandãoite (no replies)

May 28, 2019, 6:10 am
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Reference:
▪ Menezes Filho, L.A.D., Chaves, M.L.S.C., Cooper, M.A., Ball, N.A., Abdu, Y.A., Sharpe, R., Day, M.C., Hawthorne, F.C. (2019): Brandãoite, [BeAl2(PO4)2(OH)2(H2O)4](H2O), a new Be-Al-phosphate mineral from the João Firmino mine, Pomarolli farm region, Divino das Laranjeiras county, Minas Gerais State, Brazil: description and crystal structure. [i]Mineralogical Magazine[/i], [b]83[/b], 261-267.

Abstract:
Brandãoite, [BeAl2(PO4)2(OH)2(H2O)4](H2O), is a new Be-Al-phosphate mineral from the João Firmino mine, Pomarolli farm region, Divino das Laranjeiras County, Minas Gerais State, Brazil, where it occurs in an albite pocket with other secondary phosphates, including beryllonite, atencioite and zanazziite, in a granitic pegmatite. It occurs as colourless acicular crystals less than 10 μm wide and less than 100 μm long that form compact radiating spherical aggregates up to 1.0-1.5 mm across. It is colourless and transparent in single crystals and white in aggregates, has a white streak and a vitreous lustre, is brittle and has conchoidal fracture. Mohs hardness is 6, and the calculated density is 2.353 g/cm3. Brandãoite is biaxial positive, α = 1.544, β = 1.552, γ = 1.568, all 0.002; 2Vobs = 69.7(10)°, 2Vcalc = 71.2°. No pleochroism was observed. Brandãoite is triclinic, space group P-1, a = 6.100(4), b = 8.616(4), c = 10.261(5) Å, α = 93.191(11), β = 95.120(11), γ = 96.863(11)°, V = 532.1(8) Å3, Z = 2. Chemical analysis of a needle 4 μm wide by electron microprobe and secondary-ion mass spectrometry gave P2O5 = 28.42, Al2O3 20.15, BeO 4.85, H2O 21.47, sum 74.89 wt%. The empirical formula, normalized on the basis of 15 anions pfu with (OH) = 2 and (H2O) = 5 apfu (from the crystal structure) is Be0.98Al1.99P2.02H12O15. The crystal structure was solved by direct methods and refined to an R1 index of 7.0%. There are two P sites occupied by P5+, two Al sites occupied by octahedrally coordinated Al3+, and one Be site occupied by tetrahedrally coordinated Be2+. There are fifteen anions, two of which are (OH) groups and five of which are (H2O) groups. The simplified ideal formula is thus [BeAl2(PO4)2(OH)2(H2O)4](H2O) with Z = 2. Be and P tetrahedra share corners to form a four-membered ring. Al octahedra share a common vertex to form an [Al2φ11] dimer, and these dimers are cross-linked by P tetrahedra to form a complex slab of polyhedra parallel to (001). These slabs are cross-linked by BeO2(OH)(H2O) tetrahedra, with interstitial (H2O) groups in channels that extend along [100].
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IMA 2014-110 = tsangpoite / IMA 2015-121 = matyhite (no replies)

May 28, 2019, 6:34 am
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Reference:
▪ Hwang, S.-L., Shen, P., Chu, H.-T., Yui, T.-F., Varela, M.-E., Iizuka, Y. (2019): New minerals tsangpoite Ca5(PO4)2(SiO4) and matyhite Ca9(Ca0.5□0.5)Fe(PO4)7 from angrite D'Orbigny. Mineralogical Magazine, 83, 293-313.

Abatract:
Tsangpoite, ideally Ca5(PO4)2(SiO4), the hexagonal polymorph of silicocarnotite, and matyhite, ideally Ca9(Ca0.5□0.5)Fe(PO4)7, the Fe-analogue of Ca-merrillite, were identified from the D'Orbigny angrite meteorite by electron probe microanalysis, electron microscopy and micro-Raman spectroscopy. On the basis of electron diffraction, the symmetry of tsangpoite was shown to be hexagonal, P63/m or P63, with a = 9.489(4) Å, c = 6.991(6) Å, V = 545.1(6) Å3 and Z = 2 for 12 oxygen atoms per formula unit, and that of matyhite was shown to be trigonal, R3c, with a = 10.456 (7) Å, c = 37.408(34) Å, V = 3541.6 (4.8) Å3 and Z = 6 for 28 oxygen atoms per formula unit. On the basis of their constant association with the grain-boundary assemblage: Fe sulfide + ulvöspinel + Al–Ti-bearing hedenbergite + fayalite–kirschsteinite intergrowth, the formation of tsangpoite and matyhite, along with kuratite (the Fe-analogue of rhönite), can be readily rationalised as crystallisation from residue magmas at the final stage of the D'Orbigny meteorite formation. Alternatively, the close petrographic relations between tsangpoite/matyhite and the resorbed Fe sulfide rimmed by fayalite + kirschsteinite symplectite, such as the nucleation of tsangpoite in association with magnetite ± other phases within Fe sulfide and the common outward growth of needle-like tsangpoite or plate-like matyhite from the fayalite–kirschsteinite symplectic rim of Fe sulfide into hedenbergite, infer that these new minerals and the grain-boundary assemblage might represent metasomatic products resulting from reactions between an intruding metasomatic agent and the porous olivine–plagioclase plate + fayalite-kirschsteinite overgrowth + augite + Fe sulfide aggregates. Still further thermochemical and kinetics evidence is required to clarify the exact formation mechanisms/conditions of the euhedral tsangpoite, matyhite and kuratite at the grain boundary of the D'Orbigny angrite.
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IMA 2017-028 = manganiakasakaite-(La) / IMA 2018-087 = ferriakasakaite-(Ce) (no replies)

June 9, 2019, 6:16 am
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Reference:
▪ Biagioni, C., Bonazzi, P., Pasero, M., Zaccarini, F., Balestra, C., Bracco, R., Ciriotti, M.E. (2019): Manganiakasakaite-(La) and Ferriakasakaite-(Ce), Two New Epidote Supergroup Minerals from Piedmont, Italy. Minerals, 9, 353; https://doi.org/10.3390/min9060353

Abstract:
Two new monoclinic (P21/m) epidote supergroup minerals manganiakasakaite-(La) and ferriakasakaite-(Ce) were found in the small Mn ore deposit of Monte Maniglia, Bellino, Varaita Valley, Cuneo Province, Piedmont, Italy. Manganiakasakaite-(La) occurs as subhedral grains embedded in pyroxmangite. Its empirical formula is A(1)(Ca0.62Mn2+0.38) A(2)(La0.52Nd0.08Pr0.07Ce0.07Y0.01Ca0.25) M(1)(Mn3+0.52Fe3+0.28Al0.18V3+0.01) M(2)Al1.00 M(3)(Mn2+0.60Mn3+0.27Mg0.13) T(1−3)(Si2.99Al0.01) O12 (OH), corresponding to the end-member formula CaLaMn3+AlMn2+(Si2O7)(SiO4)O(OH). Unit-cell parameters are a = 8.9057(10), b = 5.7294(6), c = 10.1134(11) Å, β = 113.713(5)°, V = 472.46(9) Å3, Z = 2. The crystal structure of manganiakasakaite-(La) was refined to a final R1 = 0.0262 for 2119 reflections with Fo > 4σ(Fo) and 125 refined parameters. Ferriakasakaite-(Ce) occurs as small homogeneous domains within strongly inhomogeneous prismatic crystals, where other epidote supergroup minerals coexist [manganiandrosite-(Ce), “androsite-(Ce)”, and epidote]. Associated minerals are calcite and hematite. Its empirical formula is A(1)(Ca0.64Mn2+0.36) A(2)(Ce0.37La0.17Nd0.06Pr0.03Ca0.35□0.02) M(1)(Fe3+0.61Al0.39) M(2)Al1.00 M(3)(Mn2+0.64Mn3+0.33Fe3+0.02Mg0.01) T(1−3)Si3.01 O12 (OH), the end-member formula being CaCeFe3+AlMn2+(Si2O7)(SiO4)O(OH). Unit-cell parameters are a = 8.9033(3), b = 5.7066(2), c = 10.1363(3) Å, β = 114.222(2)°, V = 469.66(3) Å3, Z = 2. The crystal structure of ferriakasakaite-(Ce) was refined to a final R1 = 0.0196 for 1960 unique reflections with Fo > 4σ(Fo) and 124 refined parameters.
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IMA 2018-124 = orthocuproplatinum (no replies)

July 11, 2019, 2:03 am
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Reference:
▪ Cabral, A.R., Skála, R., Vymazalová, A., Maixner, J., Stanley, C.J., Lehmann, B., Jedwab, J. (2019): Orthocuproplatinum, Pt3Cu, a new mineral from the Lubero region, North Kivu, Democratic Republic of the Congo. Mineralogy and Petrology, 113, 527-532.

Abstract:
Orthocuproplatinum, Pt3Cu, is a new mineral from the Lubero region of North Kivu, Democratic Republic of the Congo. The mineral, which has a synthetic analogue, occurs as a 1.5-mm-long alluvial grain in a heavy-mineral concentrate, together with the holotype specimen of kitagohaite, Pt7Cu. The grain of orthocuproplatinum has a rim of hongshiite, PtCu, and abundant inclusions of calcite. Opaque and metallic, orthocuproplatinum has a whitish colour in reflected light and slightly perceptible anisotropy. The crystal structure of orthocuproplatinum is orthorhombic, space group Cmmm. Its unit-cell parameters: a = 7.681(1) Å; b = 5.4318(8) Å; c = 2.7502(4) Å; V = 114.74(3) Å3; Z = 2. The calculated density is 17.866 g cm−3. The strongest diffraction lines are [d in Å(I)]: 2.337 (11), 2.236 (100), 2.217 (97), 1.932 (61), 1.920 (30), 1.362 (36), 1.169 (24), 1.161 (23). The Vickers hardness is 243 kg mm−2 (VHN25), corresponding to a Mohs hardness of 4. The empirical formula of orthocuproplatinum, calculated from a mean value of 12 electron-probe microanalyses that gave 12.9 wt% Cu and 87.3 wt% Pt, is Pt2.76Cu1.24 on the basis of 4 atoms.
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IMA 2016-089 = fluorbarytolamprophyllite (no replies)

July 11, 2019, 2:04 am
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Reference:
▪ Filina, M.I., Aksenov, S.M., Sorokhtina, N.V., Chukanov, N.V., Kononkova, N.N., Belakovskiy, D.I., Britvin, S.N., Kogarko, L.N., Chervonnyi, A.D., Rastsvetaeva, R.K. (2019): The new mineral fluorbarytolamprophyllite, (Ba,Sr,K)2[(Na,Fe2+)3TiF2][Ti2(Si2O7)2O2] and chemical evolution of lamprophyllite-group minerals in agpaitic syenites of the Kola Peninsula. Mineralogy and Petrology, 113, 533–553.

Abstract:
Unusual agpaitic syenites containing up to 25 vol.% lamprophyllite-group minerals (lamprophyllite, fluorlamprophyllite, barytolamprophyllite, and the new mineral species fluorbarytolamprophyllite, IMA 2016–089) have been discovered in the Niva intrusion and Mokhnatye Roga alkaline dyke belonging to the Kola Alkaline Province, northwestern Russia. The other main components of the rocks are potassium feldspar, Ti-rich aegirine-augite, aenigmatite, alkaline amphiboles, astrophyllite, natrolite, and ferripyrophyllite. Three generations of lamprophyllite-group minerals can be distinguished based on their morphological features. The new mineral fluorbarytolamprophyllite is the F-dominant analogue of barytolamprophyllite and the Ba-dominant analogue of fluorlamprophyllite. It represents the early generation of lamprophyllite-group minerals (LGM) and forms brown prismatic crystals, their radial aggregates and marginal zones of fluorlamprophyllite crystals. The lustre of the new mineral is vitreous to pearly. Mohs hardness is 2.5. Dcalc is 3.662 g/cm3. The mineral is optically biaxial (+), α = 1.738(3), β = 1.745(4), γ = 1.777(4) (589 nm), 2 V (meas.) = 55(5)°, 2 V (calc.) = 51°. The chemical composition (electron microprobe, water determined by TGA, wt.%) is: Na2O 10.01, K2O 2.65, MgO 0.43, CaO 0.64, SrO 5.59, BaO 16.23, MnO 0.50, FeO 4.44, Al2O3 0.08, TiO2 27.31, ZrO2 0.22, Nb2O5 0.91, Ta2O5 0.15, SiO2 29.35, F 2.41, H2O 0.26, total 101.18. The empirical formula based on 18 anions is (Ba0.865Sr0.44K0.46Na0.26)Σ2.025(Na2.38Ca0.09Fe0.47Mn0.06)Σ3.00(Ti2.79Mg0.09Fe0.035Nb0.06Zr0.015Ta0.01)Σ3.00(Si3.99Al0.01)Σ4.00 O16[F1.04O0.72(OH)0.24]Σ2.00. The IR spectrum is given. The strongest lines of the powder X-ray diffraction pattern are [d, Å (I,%) (hkl)]: 9.692 (40) (200), 3.726 (59) (−311), 3.414 (67) (311), 3.230 (96) (300), 3.013 (53) (−5–11), 2.780 (100) (221), 2.662 (52) (002). The crystal structure has been solved and refined to R1 = 5.07 based on 2897 independent reflections with I > 2σ(I). Fluorbarytolamprophyllite is monoclinic, space group C2/m. The unit-cell parameters refined from the powder data are: a = 19.520(5), b = 7.0995(17), c = 5.3896(20) Å, β = 96.657(23)°; V = 741.86(24) Å3, Z = 2. At Niva and Mokhnatye Roga, most of the LGM were formed during magmatic stage of syenite crystallization from alkaline melt enriched in Na, K, Ba, Fe, Ti and F. Compositional variation of the examined LGM and their textural relations show changes in the Sr/Ba ratio in the parental melt and increasing activity of F and Ba in derivatives fluids as the main factors driving this variation.
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IMA 2018-028 = lepageite (no replies)

July 17, 2019, 4:06 am
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Reference:
▪ Piecza, A., Cooper, M.A., Hawthorne, F.C. (2019): Lepageite, Mn32+(Fe73+Fe42+)O3[Sb53+As83+O34]⁠, a new arsenite-antimonite mineral from the Szklary pegmatite, Lower Silesia, Poland. American Mineralogist, 104, 1043-1050.

Abstract:
Lepageite, a new arsenite-antimonite mineral, was discovered in a granitic pegmatite hosted by serpentinites of the Szklary massif, Lower Silesia, southwest Poland. Lepageite is a primary mineral formed during injection of an evolved LCT-type melt related to anatectic processes within the metasedimentary-metavolcanic complex of the nearby Góry Sowie Block, ~380 Ma, into serpentinite of the Szklary massif and its contamination by fluid-mobile serpentinite-hosted elements, among others As and Sb, transported in the form of H2AsO3– and HSbO2 species at pH ≈ 9–11 and a low redox potential of –0.7 to –0.3 V.
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IMA 2018-009 = phoxite (no replies)

July 17, 2019, 4:31 am
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Reference:
▪ Kampf, A.R., Celestian, A.J., Nash, B.P., Marty, J. (2019): Phoxite, (NH4)2Mg2(C2O4)(PO3OH)2(H2O)4, the first phosphate-oxalate mineral. American Mineralogist, 104, 973–979.

Abstract:
Phoxite, (NH4)2Mg2(C2O4)(PO3OH)2(H2O)4, is a new mineral species from the Rowley mine, Maricopa County, Arizona, U.S.A., and it has potential uses in agricultural applications for soil conditioning, fertilizing, and as a natural pesticide. It was found in an unusual bat-guano-related, post-mining assemblage of phases that include a variety of vanadates, phosphates, oxalates, and chlorides, some containing NH4+. Other secondary minerals found in association with phoxite are antipinite, aphithitalite, bassanite, struvite, thenardite, and weddellite. Crystals of phoxite are colorless composite blades up to about 0.4 mm. The streak is white, and the luster is vitreous to oily. The Mohs hardness is 2½, the tenacity is brittle, fracture is irregular, there is fair {100} cleavage, and the measured density is 1.98(2) g/cm3. Phoxite is optically biaxial (–) with α = 1.499(1), β = 1.541(1), γ = 1.542(1) (white light); 2V = 16(1)°; dispersion r < v, slight; orientation Y = b, X ^ a ≈ 9° in obtuse β. Electron microprobe analyses yielded the empirical formula [(NH4)1.77K0.23]Σ2Mg2.00(C2O4)(PO3OH)2(H2O)4, with the C and H content inferred from the crystal structure. Raman spectroscopy confirmed the presence of NH4 and C2O4. Phoxite is monoclinic, P21/c, with a = 7.2962(3), b = 13.5993(4), c = 7.8334(6) Å, β = 108.271(8)°, V = 738.07(7) Å3, and Z = 2. In the crystal structure of phoxite (R1 = 0.0275 for 1147 Io > 2σI reflections), bidentate linkages between C2O4 groups and Mg-centered octahedra yield chains, which link to one another via PO3OH tetrahedra to create undulating [Mg2(C2O4)(PO3OH)2(H2O)4]2– sheets. Strong hydrogen bonds link the sheets into a “soft framework,” with channels containing NH4+. The NH4+ forms both ordered hydrogen bonds and electrostatic bonds with O atoms in the framework. Phoxite is the first mineral known to contain both phosphate and oxalate groups as essential components.
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IMA 2015-009 = meieranite (no replies)

July 20, 2019, 2:16 am
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Reference:
▪ Yang, H., Gu, X., Downs, R.T., Evans, S.H., Van Nieuwenhuizen, J.J., Lavinsky, R.M., Xie, X. (2019): Meieranite, Na2Sr3MgSi6O17, a New Mineral from the Wessels Mine, Kalahari Manganese Fields, South Africa. Canadian Mineralogist, 57, 457-466.

Abstract:
A new mineral species, meieranite, ideally Na2Sr3MgSi6O17, has been found in the Wessels mine, Kalahari Manganese Fields, Northern Cape Province, South Africa. It occurs in isolated aggregates embedded in a matrix mainly of sugilite, along with minor aegirine and pectolite. Crystals of meieranite are up to 0.5 × 0.5 × 0.4 mm in size. No twinning is observed. The mineral is light blue to blue in transmitted and under incident lights, transparent with white streak, and has vitreous luster. It is brittle and has a Mohs hardness of 5.5; cleavage is good on {010} and no parting was observed. The measured and calculated densities are 3.41(3) and 3.410 g/cm3, respectively. Optically, meieranite is biaxial (–), with α = 1.610(1), β = 1.623(1), γ = 1.630(1) (white light), 2V (meas.) = 70(1)°, 2V (calc.) = 72°. The calculated compatibility index based on the empirical formula is –0.007 (superior). An electron microprobe analysis yields an empirical formula (based on 17 O apfu) of Na1.96(Sr2.91Ba0.03Ca0.03Pb0.02)Σ2.99(Mg0.62Mn0.28Co0.07Fe0.01)Σ0.98Si6.03O17, which can be simplified to Na2Sr3MgSi6O17.
Meieranite is orthorhombic, with space group P21nb and unit-cell parameters a 7.9380(2), b 10.4923(3), c 18.2560(6) Å, and V 1520.50(8) Å3. Its crystal structure is characterized by two kinds of layers that alternate along [010]: layers of corner-sharing SiO4 and M2+O4 tetrahedra (M2+ = Mg, Mn, Co, Fe) and layers of NaO6 and SrO8 polyhedra. The tetrahedral layers consist of eight-, five-, and four-membered rings and are composed of [Si6O17] ribbons (parallel to [101]) linked together by MO4 tetrahedra. Most remarkably, the structure of meieranite is topologically identical to that of the nordite group of minerals, which has the general chemical formula Na3SrR3+M2+Si6O17, where R = Ce and La and M = Zn, Fe, and Mn. Accordingly, chemically, meieranite may be obtained through the coupled substitution of 2Sr2+ for (Na+ + R3+) in nordite.
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IMA 2015-122 = huenite (no replies)

July 20, 2019, 2:19 am
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Reference:
▪ Vignola, P., Rotiroti, N., Gatta, G.D., Risplendente, A., Hatert, F., Bersani, D., Mattioli, V. (2019): Huenite, Cu4Mo3O12(OH)2, a New Copper-molybdenum Oxy-hydroxide Mineral from the San Samuel Mine, Carrera Pinto, Cachiyuyo De Llampos District, Copiapo Province, Atacama Region, Chile. Canadian Mineralogist, 57, 467-474.

Abstract:
Huenite, Cu4Mo3O12(OH)2, is a new copper and molybdenum oxy-hydroxide mineral found in the San Samuel Mine, Carrera Pinto, Cachiyuyo de Llampos district, Copiapó Province, Atacama Region, Chile. This new species forms flattened orthorhombic prisms up to 60–70 μm in size, weakly elongated along [001]. Huenite crystals were found on fractured surfaces of a quartz breccia, forming aggregates 1 mm in diameter in close association with lindgrenite, gypsum, dark grayish-brown tourmaline, and an unknown pale purple phase. The color is very dark reddish-brown, with a strong vitreous to adamantine luster. Its streak is pale reddish-brown to pinkish. The mineral is brittle with an irregular fracture and a Mohs hardness of 3.5–4 with a good cleavage on {010}. Its calculated density is 5.1 g/cm3. The calculated refractive index is 2.18. Huenite is non-fluorescent under 254 nm (short wave) and 366 nm (long wave) ultraviolet light. The empirical formula, calculated on the basis of 3 (Mo+S+Si) atoms per formula unit, is (Cu3.519Fe2+0.403)Σ3.922(Mo2.907S0.090Si0.003)Σ3.000O12·(OH)2.229, with H2O content calculated for a total of 100 wt.%. Huenite is trigonal, with space group P31/c and unit-cell parameters a = 7.653(5) Å, c = 9.411(6) Å, and V = 477.4(5) Å3 for Z = 2. The eight strongest measured powder X-ray diffraction lines are: [d in Å, (I/I0), (hkl)]: 2.974 (100) (112), 1.712 (59.8) (132), 3.810 (50.6) (110), 2.702 (41.2) (022), 2.497 (38.1) (120), 1.450 (37.2) (134), 6.786 (24.9) (010), and 5.374 (24.5) (011). The mineral, which has been approved by the CNMNC under number IMA 2015-122, is named in honor of Edgar Huen.
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New Minerals approved by IMA CNMNC in June and July 2019 (no replies)

July 22, 2019, 4:59 am
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[b]IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 50[/b]
[b][u]
New minerals and nomenclature modifications approved in 2019[/u][/b]

[b]NEW MINERAL PROPOSALS APPROVED IN JUNE 2019[/b]

IMA No. 2018-138
Lingbaoite
AgTe3
S60 gold-bearing quartz vein, ca. 30 km SW of Lingbao city, Henan province, China (34°24’N,
110°31’E)
Wei Jian*, Jingwen Mao, Bernd Lehmann, Yanhe Li, Huishou Ye, Jianhui Cai and Zongyan Li
*E-mail: jianwei@cags.ac.cn
Known synthetic analogue
Trigonal: R3m; structure determined
a = 8.645(14), c = 5.272(9) Å
3.052(100), 2.161(36), 2.155(50), 1.763(16), 1.757(10), 1.526(9), 1.366(11), 1.363(16)
Type material is deposited in the mineralogical collections of the Institute of Mineral Resources,
Chinese Academy of Geological Sciences, Baiwanzhuang Street 26, Beijing, China, catalogue number
M13812 (holotype) and the Geological Museum of China, Yangrouhutong Street 15, Xicheng District,
Beijing, China, catalogue number M13812 (cotype)
How to cite: Jian W., Mao J., Lehmann B., Li Y., Ye H., Cai J. and Li Z. (2019) Lingbaoite, IMA
2018-138. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-007
Gmalimite
K6☐Fe2+24S27
Halamish wadi, southern part of the Hatrurim Complex, Negev Desert, Israel (31°09’42”N,
35°17’29”E)
Irina O. Galuskina*, Biljana Krüger, Evgeny V. Galuskin, Hannes Krüger, Yevgeny Vapnik,
Kamila Banasik, Mikhail Murashko, Atali A. Agakhanov and Anuschka Pauluhn
*E-mail: irina.galuskina@us.edu.pl
The K analogue of zoharite
Cubic: Pm-3m; structure determined
a = 10.34863(8) Å
10.357(91), 7.323(33), 5.979(59), 3.123(56), 2.990(58), 2.376(50), 1.831(100), 1.057(14)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian
Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number
5297/1
How to cite: Galuskina I.O., Krüger B., Galuskin E.V., Krüger H., Vapnik Y., Banasik K.,
Murashko M., Agakhanov A.A. and Pauluhn A. (2019) Gmalimite, IMA 2019-007. CNMNC
Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-008
Ferroefremovite
(NH4)2Fe2+2(SO4)3
“Bocca Grande” fumarole, Solfatara di Pozzuoli, Flegrean Volcanic Complex, Napoli Province,
Campania, Italy (40°49’41”N, 14°8’30”E)
Anatoly V. Kasatkin*, Jakub Plášil, Radek Škoda, Italo Campostrini, Nikita V. Chukanov, Atali
A. Agakhanov, Vladimir Y. Karpenko and Dmitriy I. Belakovskiy
*E-mail: anatoly.kasatkin@gmail.com
The Fe analogue of efremovite
Cubic: P213; structure determined
a = 10.0484(9) Å
5.80(40), 4.50(20), 4.11(30), 3.17(100), 3.02(20), 2.68(50), 1.86(18), 1.62(18)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian
Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number
5368/1
How to cite: Kasatkin A.V., Plášil J., Škoda R., Campostrini I., Chukanov N.V., Agakhanov A.A.,
Karpenko V.Y. and Belakovskiy D.I. (2019) Ferroefremovite, IMA 2019-008. CNMNC
Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-010
Scordariite
K8(Fe3+0.67☐0.33)[Fe3+3O(SO4)6]2·14H2O
Monte Arsiccio mine, Stazzema (LU), Apuan Alps, Tuscany, Italy (43°58’N, 10°17’E)
Cristian Biagioni*, Luca Bindi and Daniela Mauro
*E-mail: cristian.biagioni@unipi.it
Structurally related to metavoltine and carlsonite
Trigonal: R-3 ; structure determined
a = 9.7509(4), c = 53.525(2) Å
8.8 (mw), 8.3(s), 6.6(m), 4.22(m), 3.777(m), 3.299(m), 3.189(m), 2.884(s)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale,
Università di Pisa, Via Roma 79, Calci (Pisa, Italy), catalogue number 19893
How to cite: Biagioni C., Bindi L. and Mauro D. (2019) Scordariite, IMA 2019-010. CNMNC
Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-011
Limousinite
BaCa[Be4P4O16]∙6H2O
Vilatte-Haute quarry, Chanteloube near Razès, Limousin, Haute-Vienne, France (46°03’55”N,
1°22’03”E)
Frédéric Hatert*, Nicolas Meisser, Fabrice Dal Bo, Yannick Bruni, Pietro Vignola, Andrea
Risplendente, François-Xavier Châtenet and Julien Lebocey
*E-mail: fhatert@ulg.ac.be
Structurally related to phillipsite
Monoclinic: P21/c; structure determined
a = 9.4958(4), b = 13.6758(4), c = 13.4696(4) Å, β = 90.398(3)°
3.89(100), 3.75(60), 3.09(60), 3.01(90), 2.219(50), 2.058(60), 1.879(40), 1.735(40)
Type material is deposited in the mineralogical collections of the Geological Museum of
Lausanne, Switzerland, catalogue number MGL 093398, and the Laboratory of Mineralogy,
University of Liège, Belgium, catalogue number ULG 21167
How to cite: Hatert F., Meisser N., Dal Bo F., Bruni Y., Vignola P., Risplendente A., Châtenet F.-
X. and Lebocey J. (2019) Limousinite, IMA 2019-011. CNMNC Newsletter No. 50;
Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-012
Nishanbaevite
KAl2O(AsO4)(SO4)
Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik
Fissure Eruption, Tolbachik volcano, Kamchatka peninsula, Far-Eastern Region, Russia (55°41’N,
160°14’E, 1200 m asl)
Igor V. Pekov*, Natalia V. Zubkova, Vasiliy O. Yapaskurt, Dmitry I. Belakovskiy, Sergey N.
Britvin, Atali A. Agakhanov, Anna G. Turchkova, Evgeny G. Sidorov and Dmitry Y.
Pushcharovsky
*E-mail: igorpekov@mail.ru
New structure type
Orthorhombic: Pbcm; structure determined
a = 15.487(3), b = 7.258(2), c = 6.601(2) Å
15.49(100), 6.56(30), 4.653(29), 3.881(54), 3.625(27), 3.289(52), 3.113(29), 3.038(51)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5379/1
How to cite: Pekov I.V., Zubkova N.V., Yapaskurt V.O., Belakovskiy D.I., Britvin S.N., Agakhanov A.A., Turchkova A.G., Sidorov E.G. and Pushcharovsky D.Y. (2019) Nishanbaevite, IMA 2019-012. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-013
Nazarovite
Ni12P5
Halamish wadi, southern part of the Hatrurim basin, Negev Desert, Israel (31°9’47”N, 35°17’57”E – holotype); Marjalahti meteorite, fallen June 01, 1902 at the northern coast of the Ladoga see, Karelia, Russia (61°30’N, 30°30’E – cotype)
Sergey N. Britvin*, Mikhail N. Murashko, Maria G. Krzhizhanovskaya, Oleg S. Vereshchagin, Yevgeny Vapnik, Vladimir V. Shilovskikh and Maksim S. Lozhkin
*E-mail: sbritvin@gmail.com
Known synthetic analogue
Tetragonal: I4/m; structure determined
a = 8.640(1), c = 5.071(3) Å
4.374(5), 2.503(5), 2.341(54), 2.160(13), 2.040(15), 1.931(40), 1.860(100)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5381/1
How to cite: Britvin S.N., Murashko M.N., Krzhizhanovskaya M.G., Vereshchagin O.S., Vapnik Y., Shilovskikh V.V. and Lozhkin M.S. (2019) Nazarovite, IMA 2019-013. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-014
Sangenaroite
Ag8(Sb8–xAsx)S16 (0 < x < 2)
San Genaro mine, Huancavelica, Peru (13°11’30.4”S, 75°8’36.3”W)
Dan Topa*, Frank N. Keutsch and Chris Stanley
*E-mail: dan.topa@nhm-wien.ac.at
The Sb-rich end-member of ferdowsiite
Monoclinic: P21/n; structure determined
a = 8.758(2), b = 5.814(1), c = 13.876(3) Å, β = 96.666(3)°
3.23(97), 3.23(94), 2.907(78), 2.773(100), 2.720(90), 2.007(62), 1.986(56), 1.944(36)
Type material is deposited in the mineralogical collections of the Naturhistorisches Museum, Burgring 7, 1010 Wien, Austria, specimen number O 1090
How to cite: Topa D., Keutsch F.N. and Stanley C. (2019) Sangenaroite, IMA 2019-014. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-018
Patynite
NaKCa4[Si9O23]
Patyn Mt. massif, Tashtagolskiy District, Kemerovo Oblast’, Southern Siberia, Russia
(53°3’32”N, 88°44’29”E)
Anatoly V. Kasatkin*, Fabrizio Nestola, Nikita V. Chukanov, Radek Škoda, Fernando Cámara,
Atali A. Agakhanov, Dmitriy I. Belakovskiy and Vladimir S. Lednyov
*E-mail: anatoly.kasatkin@gmail.com
New structure type
Triclinic: P-1; structure determined
a = 7.2743(1), b = 10.5516(2), c = 13.9851(3) Å, α = 104.203(2), β = 104.302(2), γ = 92.028(1)°
4.947(13), 3.454(100), 3.262(66), 3.103(64), 2.931(16), 2.801(21), 2.592(18), 1.820(28)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian
Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number
5369/1
How to cite: Kasatkin A.V., Nestola F., Chukanov N.V., Škoda R., Cámara F., Agakhanov A.A.,
Belakovskiy D.I. and Lednyov V.S. (2019) Patynite, IMA 2019-018. CNMNC Newsletter No. 50;
Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2018-123a
Taipingite-(Ce)
(Ce3+7Ca2)Σ9Mg(SiO4)3[SiO3(OH)]4F3
Taiping town deposit, North Qinling Orogen, southeast Henan Province, China (33°39’10”N,
111°41’33”E)
Kai Qu*, Xianzhang Sima, Guang Fan, Guowu Li, Ganfu Shen, Huakai Chen, Xing Liu, Qingqing
Yin, Ting Li and Yanjuan Wang
*E-mail: qukai_tcgs@foxmail.com
Cerite group
Trigonal: R3c; structure determined
a = 10.7246(3), c = 37.953(1) Å
4.518(50), 3.455(95), 3.297(85), 3.098(35), 2.941(100), 2.683(65), 1.945(40), 1.754(40)
Type material is deposited in the mineralogical collection of the Geological Museum of China,
No. 16, Yangrou Hutong, Xisi, Beijing 100031, People’s Republic of China, catalogue number
M16084
How to cite: Qu K., Sima X., Fan G., Li G., Shen G., Chen H., Liu X., Yin Q., Li T. and Wang Y.
(2019) Taipingite-(Ce), IMA 2018-123a. CNMNC Newsletter No. 50; Mineralogical Magazine,
31, doi: 10.1180/mgm.2019.46

[b]NEW MINERAL PROPOSALS APPROVED IN JULY 2019[/b]

IMA No. 2019-017
Dritsite
Li2Al4(OH)12Cl2·3(H2O)
Drillcore of borehole #2001 (depth 248 m), Romanovskiy area of the Verkhnekamskoe potassium
salt deposit, 30 km S of the city of Berezniki, Perm Krai, Western Urals, Russia
Elena S. Zhitova, Igor V. Pekov, Ilya I. Chaikovskiy, Elena P. Chirkova, Vasiliy O. Yapaskurt,
Yana V. Bychkova, Dmitry I. Belakovsky, Nikita V. Chukanov, Natalia V. Zubkova, Sergey V.
Krivovichev and Vladimir N. Bocharov
*E-mail: zhitova_es@mail.ru
Hydrotalcite supergroup
Hexagonal: P63/mcm; structure determined
a = 5.0960(3), c = 15.358(1) Å
7.68(100), 4.422(61), 3.832(99), 2.561(30), 2.283(25), 1.963(19), 1.807(20), 1.445(26)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian
Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number
5380/1
How to cite: Zhitova E.S., Pekov I.V., Chaikovskiy I.I., Chirkova E.P., Yapaskurt V.O., Bychkova
Y.V., Belakovsky D.I., Chukanov N.V., Zubkova N.V., Krivovichev S.V. and Bocharov V.N.
(2019) Dritsite, IMA 2019-017. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi:
10.1180/mgm.2019.46

IMA No. 2019-019
Hiroseite
FeSiO3
Suizhou meteorite, fallen in Dayanpo, 12.5 km SE of the Suizhou city, Hubei province, China
Luca Bindi* and Xiande Xie
*E-mail: luca.bindi@unifi.it
The Fe analogue of bridgmanite
Orthorhombic: Pnma; structure determined
a = 5.0016(5), b = 7.0031(3), c = 4.8460(3) Å
2.591(16), 2.468(56), 2.423(18), 1.751(68), 1.740(100), 1.434(26), 1.407(33), 1.231(27)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale,
Università di Firenze, Via La Pira 4, I-50121, Firenze, Italy, catalogue number 3238/I
How to cite: Bindi L. and Xie X. (2019) Hiroseite, IMA 2019-019. CNMNC Newsletter No. 50;
Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-020
Monchetundraite
Pd2NiTe2
Borehole 1819 (depth 101 m), Monchetundra layered Intrusion, Kola Peninsula, Russia
(67°52’22”N, 32°47’60”E)
Anna Vymazalová*, František Laufek, Tatiana L. Grokhovskaya and Chris J. Stanley
*E-mail: anna.vymazalova@geology.cz
Known synthetic analogue
Orthorhombic: Ibam
a = 6.31, b = 11.25, c = 5.17 Å
X-ray powder diffraction not available
Type material is deposited in the mineralogical collections of the Department of Earth Sciences,
Natural History Museum, London SW7 5BD, UK, catalogue number BM2019,2
How to cite: Vymazalová A., Laufek F., Grokhovskaya T.L. and Stanley C.J. (2019)
Monchetundraite, IMA 2019-020. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi:
10.1180/mgm.2019.46

IMA No. 2019-021
Maletoyvayamite
Au3Se4Te6
Gaching occurrence, Maletoyvayam ore field, southwestern part of the Koryak Highland, central
Kamchatka volcanic belt, Far East Region, Russia (60°19’51.87”N, 164°46’25.65”E)
Nadhezda D. Tolstykh, Marek Tuhý*, Anna Vymazalová, Jakub Plášil, František Laufek, Anatoly
V. Kasatkin and Fabrizio Nestola
*E-mail: marek.tuhy@geology.cz
Known synthetic analogue
Triclinic: P-1
a = 8.901(2), b = 9.045(1), c = 9.265(4) Å, α = 97.66(3), β = 106.70(2), γ = 101.40(1)°
8.650(25), 4.331(5), 2.911(100), 2.223(7), 2.180(6), 1.930(8), 1.901(8), 1.725(6)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5369/1
How to cite: Tolstykh N.D., Tuhý M., Vymazalová A., Plášil J., Laufek F., Kasatkin A.V. and Nestola F. (2019) Maletoyvayamite, IMA 2019-021. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-022
Bianchiniite
Ba2(TiV)(As2O5)2OF
Sant’Olga tunnel, Monte Arsiccio mine, Stazzema (LU), Apuan Alps, Tuscany, Italy (43°58’N, 10°17’E)
Cristian Biagioni*, Marco Pasero, Ulf Hålenius and Ferdinando Bosi
*E-mail: cristian.biagioni@unipi.it
New structure type
Tetragonal: I4/mcm; structure determined
a = 8.7301(3), c = 15.6653(5) Å
3.826(w), 3.144(vs), 2.916(w), 2.789(w), 2.598(w), 2.119(w), 2.072(w), 1.975(w)
Type material is deposited in the mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), Italy, catalogue number 19892
How to cite: Biagioni C., Pasero M., Hålenius U. and Bosi F. (2019) Bianchiniite, IMA 2019-022. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-023
Halilsarpite
[Mg(H2O)6][CaAs3+2(Fe3+2.67Mo6+0.33)(AsO4)2O7]
Oumlil mine, Bou Azzer district, Morocco (30°31’22”N, 6°47’6”W)
Ian E. Grey*, Tomas Husdal, Henrik Friis, Fabrice Dal Bo, Anthony R. Kampf, Colin M. MacRae, W. Gus Mumme, Ole-Thorstein Ljøstad and Finlay Shanks
*E-mail: ian.grey@csiro.au
Isostructural with natrowalentaite
Orthorhombic: Imma; structure determined
a = 26.489(1), b = 7.4205(3), c = 10.4378(4) Å
13.28(100), 9.710(16), 6.737(20), 6.042(18), 4.462(33), 3.018(36), 2.944(11), 2.799(14)
Type material is deposited in the mineralogical collections of the Natural History Museum, University of Oslo, PO 1172, Blindern, 0318 Oslo, Norway, registration number 44110 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 73567 (cotype)
How to cite: Grey I.E., Husdal T., Friis H., Dal Bo F., Kampf A.R., MacRae C.M., Mumme W.G., Ljøstad O.-T. and Shanks F. (2019) Halilsarpite, IMA 2019-023. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-024
Minakawaite
RhSb
Haraigawa, Misato machi, Kumamoto Prefecture, Kyushu Province, Japan
Daisuke Nishio-Hamane* and Takahiro Tanaka
*E-mail: hamane@issp.u-tokyo.ac.jp
The Sb analogue of cherepanovite
Orthorhombic: Pnma
a = 5.934(7), b = 3.848(3), c = 6.305(4) Å
2.860(63), 2.774(35), 2.250(47), 2.199(100), 2.162(38), 1.923(49), 1.843(51), 1.584(28)
Type material is deposited in the mineralogical collections of the National Museum of Nature and Science, Tsukuba, Japan, specimen number NSM-46296 (holotype) and NSM-46297 (cotype)
How to cite: Nishio-Hamane D. and Tanaka T. (2019) Minakawaite, IMA 2019-024. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-025
Magnesio-lucchesiite
CaMg3Al6(Si6O18)(BO3)3(OH)3O
Within a lamprophyre dyke, near the O’Grady batholith, Northwest Territories, Canada (62°46’8.33”N, 128°56’9.07”W)
Emily D. Scribner*, Jan Cempírek, Lee A. Groat and R. James Evans
*E-mail: escribne@eoas.ubc.ca
Tourmaline supergroup
Trigonal: R3m; structure determined
a = 15.9910(3), c = 7.2224(2) Å
6.404(32), 4.238(54), 3.998(58), 3.494(46), 2.972(70), 2.586(100), 2.048(46), 1.926(29)
Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, 240 McLeod St, Ottawa, ON K2P 2R1, Canada, reference number CMNMC 87266
How to cite: Scribner E.D., Cempírek J., Groat L.A. and Evans R.J. (2019) Magnesio-lucchesiite, IMA 2019-025. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-026
Navrotskyite
K2Na10(UO2)3(SO4)9·2H2O
Blue Lizard mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA (37°33’26”N, 110°17’48”W)
Travis A. Olds*, Anthony R. Kampf, Samuel L. Perry, Xiaofeng Guo, Joe Marty, Timothy P. Rose and Peter C. Burns
*E-mail: toldxls@gmail.com
Structurally related to meisserite and fermiite
Orthorhombic: Pbcm; structure determined
a = 5.446(1), b = 21.328(5), c = 33.439(8) Å
10.70(43), 5.59(27), 5.28(100), 3.845(36), 3.533(29), 3.225(30), 3.050(44), 2.822(29)
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 73574, 73575 and 73576
How to cite: Olds T.A., Kampf A.R., Perry S.L., Guo X., Marty J., Rose T.P. and Burns P.C. (2019) Navrotskyite, IMA 2019-026. CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-028
Hingganite-(Nd)
Nd2☐Be2Si2O8(OH)2
Zagi Mountain, near Kafoor Dheri, about 4 km S of Warsak and 30 km NW of Peshawar, Khyber Pakhtunkhwa Province, Pakistan (34°9’N, 71°24’E)
Anatoly V. Kasatkin*, Fabrizio Nestola, Radek Škoda, Nikita V. Chukanov, Atali A. Agakhanov, Dmitriy I. Belakovskiy, Arianna Lanza and Markéta Holá
*E-mail: anatoly.kasatkin@gmail.com
Gadolinite supergroup
Monoclinic: P21/c; structure determined
a = 4.7719(1), b = 7.6422(2), c = 9.9299(2) Å, β = 89.851(2)°
6.105(95), 4.959(56), 4.773(100), 3.462(58), 3.122(68), 3.028(61), 2.864(87), 2.573(89)
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian
Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number
5370/1
How to cite: Kasatkin A.V., Nestola F., Škoda R., Chukanov N.V., Agakhanov A.A., Belakovskiy
D.I., Lanza A. and Holá M. (2019) Hingganite-(Nd), IMA 2019-028. CNMNC Newsletter No. 50;
Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

IMA No. 2019-030
Metauroxite
(UO2)2(C2O4)(OH)2(H2O)2
Burro mine, Slick Rock district, San Miguel Co., Colorado, USA (38°2’42”N, 108°53’23”W)
Anthony R. Kampf*, Jakub Plášil, Barbara P. Nash and Joe Marty
*E-mail: akampf@nhm.org
Known synthetic analogue
Triclinic: P-1; structure determined
a = 5.5635(3), b = 6.1152(4), c = 7.8283(4) Å, α = 85.572(5), β = 89.340(4), γ = 82.468(5)°
6.06(45), 5.52(33), 4.97(34), 4.52(100), 3.888(80), 3.748(22), 3.180(51), 2.604(32)
Cotype material is deposited in the mineralogical collections of the Natural History Museum of
Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue
numbers 67289 and 67290
How to cite: Kampf A.R., Plášil J., Nash B.P. and Marty J. (2019) Metauroxite, IMA 2019-030.
CNMNC Newsletter No. 50; Mineralogical Magazine, 31, doi: 10.1180/mgm.2019.46

[b]NOMENCLATURE/CLASSIFICATION PROPOSALS APPROVED IN JUNE 2019[/b]

IMA 16-F: Proposition of changes in CNMNC policy towards regarding as minerals
combustion products forming on burning coal-dumps
Proposal 16-F is accepted. Crystal phases forming on the burning coal-dumps with no human
agency initiating the fire and no anthropogenic material deposited there should be treated as
minerals.

IMA 19-C: Establishing a new class of type specimen – Anthropotype
Proposal 19-C is accepted. Synthetic analogues, used to justify the existence of a new mineral
species or to obtain the missing properties required for a new mineral characterisation, are
designated as anthropotypes. These anthropotypes should be registered and stored in museums, and
made available for study just like naturally occurring type specimens.

[b]POLISH-UP OF THE IMA LIST OF MINERALS[/b]

We are making effective a number of minor changes in the chemical formulae of minerals which, in
their current form, have been inherited from previous IMA-approved compilations. In most cases
the change merely consists in the elimination of subordinate constituents occurring within the same
parentheses together with the dominant constituent. Minerals marked as Q (questionable) in the
IMA List of Minerals were not considered, since these should deserve a more detailed re-appraisal.
Similarly, minerals belonging to a supergroup for which the IMA-CNMNC approved a
comprehensive report were left behind, too, as those formulae have been already discussed and
agreed by a dedicated subcommittee. This is an executive decision taken by the officers of the IMA-CNMNC.

Alpersite
Current formula: (Mg,Cu)(SO4)·7H2O
New formula: Mg(SO4)·7H2O

Alvanite
Current formula: (Zn,Ni)Al4(VO3)2(OH)12·2H2O
New formula: ZnAl4(V5+O3)2(OH)12·2H2O

Amakinite
Current formula: (Fe2+,Mg)(OH)2
New formula: Fe(OH)2

Ammonioleucite
Current formula: (NH4,K)(AlSi2O6)
New formula: (NH4)(AlSi2O6)

Aurorite
Current formula: (Mn2+,Ag,Ca)Mn4+3O7·3H2O
New formula: Mn2+Mn4+3O7·3H2O

Biphosphammite
Current formula: (NH4,K)H2(PO4)
New formula: (NH4)H2(PO4)

Bredigite
Current formula: (Ca,Ba)Ca13Mg2(SiO4)8
New formula: Ca7Mg(SiO4)4

Chayesite
Current formula: K(Mg,Fe2+)4Fe3+[Si12O30]
New formula: KMg4Fe3+[Si12O30]

Chenevixite–Luetheite
Current formula: Cu(Fe3+,Al)(AsO4)(OH)2 (chenevixite)
Current formula: Cu2Al2(AsO4)2(OH)4·H2O (luetheite)
New formula: CuFe3+(AsO4)(OH)2 (chenevixite)
New formula: CuAl(AsO4)(OH)2 (luetheite)

Ferrokësterite
Current formula: Cu2(Fe,Zn)SnS4
New formula: Cu2FeSnS4

Hibonite–Hibonite-(Fe)
Current formula: (Ca,Ce)(Al,Ti,Mg)12O19 (hibonite)
Current formula: (Fe,Mg)Al12O19 (hibonite-(Fe))
New formula: CaAl12O19 (hibonite)
New formula: FeAl12O19 (hibonite-(Fe))

Karenwebberite
Current formula: Na(Fe2+,Mn2+)(PO4)
New formula: NaFe2+(PO4)

Kolwezite
Current formula: (Cu,Co)2(CO3)(OH)2
New formula: CuCo(CO3)(OH)2

Laphamite
Current formula: As2(Se,S)3
New formula: As2Se3

Mgriite
Current formula: (Cu,Fe)3AsSe3
New formula: Cu3AsSe3

Mozgovaite
Current formula: PbBi4(S,Se)7
New formula: PbBi4S7

Nolanite
Current formula: (V3+,Fe3+,Fe2+)10O14(OH)2
New formula: V3+8Fe3+2O14(OH)2

Okhotskite
Current formula: Ca2(Mn,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2·H2O
New formula: Ca2Mn2+Mn3+2(Si2O7)(SiO4)(OH)2·H2O

Poppiite
Current formula: Ca2(V3+,Fe3+,Mg)V3+2(Si,Al)3(O,OH)14
New formula: Ca2V3+V3+2(Si2O7)(SiO4)(OH,O)2·H2O

Pumpellyite-(Fe3+)
Current formula: Ca2(Fe3+,Mg)Al2(Si2O7)(SiO4)(OH,O)2·H2O
New formula: Ca2Fe3+Al2(Si2O7)(SiO4)(OH,O)2·H2O

Purpurite
Current formula: (Mn3+,Fe3+)(PO4)
New formula: Mn3+(PO4)

Rémondite-(Ce)–Rémondite-(La)
Current formula: Na3(Ce,La,Ca,Na,Sr)3(CO3)5 (rémondite-(Ce))
Current formula: Na3(La,Ce,Ca)3(CO3)5. (rémondite-(La))
New formula: Na3(Ce,Ca,Na)3(CO3)5 (rémondite-(Ce))
New formula: Na3(La,Ca,Na)3(CO3)5. (rémondite-(La))

Selenostephanite
Current formula: Ag5Sb(Se,S)4
New formula: Ag5SbSe4

Siderotil
Current formula: (Fe,Cu)(SO4)·5H2O
New formula: Fe(SO4)·5H2O

Triplite–Zwieselite
Current formula: (Mn2+,Fe2+)2(PO4)F (triplite)
Current formula: Fe2+Mn2+(PO4)F (zwieselite)
New formula: Mn2+2(PO4)F (triplite)
New formula: Fe2+2(PO4)F (zwieselite)

Tsnigriite
Current formula: Ag9SbTe3(S,Se)3
New formula: Ag9SbTe3S3

Vanackerite
Current formula: Pb4Cd(AsO4)3(Cl,OH)
New formula: Pb4Cd(AsO4)3Cl
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