NEW MINERAL PROPOSALS APPROVED IN APRIL 2016
IMA No. 2015-120
Wrightite
K2Al2O(AsO4)2
In a fumarole at the Second cinder cone of the Northern Breach of the Great
Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka Peninsula, Far-Eastern
Region, Russia (55°41′N, 160°14′E, 1200 m asl)
Andrey P. Shablinskii*, Stanislav K. Filatov, Lidiya P. Vergasova, Evgenia Y.
Avdontseva and Svetlana V. Moskaleva
*E-mail: shablinskii.andrey@mail.ru
New structure type
Orthorhombic: Pnma; structure determined
a = 8.2377(3), b = 5.5731(6), c = 17.683(1) Å
8.77(36), 6.01(18), 4.458(17), 4.097(16), 4.010(19), 3.875(19), 3.003(16),
2.972(100)
Type material is deposited in the collections of the Mineralogical Museum,
Saint-Petersburg State University, University Emb. 7/9, St. Petersburg 199034,
Russia, catalogue number 1/19653
How to cite: Shablinskii, A.P., Filatov, S.K., Vergasova, L.P., Avdontseva, E.Y.
and Moskaleva, S.V. (2016) Wrightite, IMA 2015-120. CNMNC Newsletter No. 31,
June 2016, page 692; Mineralogical Magazine, 80, 691–697.
IMA No. 2015-121
Matyhite
Ca18(Ca,□)2Fe2+2(PO4)14
D'Orbigny angrite, D'Orbigny, Coronel Suaréz, Buenos Aires, Argentina (37°40′S,
61°39′W)
Shyh-Lung Hwang*, Pouyan Shen, Hao-Tsu Chu, Tzen-Fu Yui, Maria Eugenia Varela
and Yoshiyuki Iizuka
*E-mail: slhwang@mail.ndhu.edu.tw
Merrillite group
Trigonal: R3c
a = 10.456(7), c = 37.41(3) Å
6.52(s), 5.24(m), 3.46(s), 3.21(s), 3.02(m), 2.88(vs), 2.75(m), 2.62(vs)
Type material is deposited in the collections of the Naturhistorisches Museum
Wien, Austria, catalogue number Section D′Orbigny C-N1172-NH Wien
How to cite: Hwang, S.-L., Shen, P., Chu, H.-T., Yui, T.-F., Varela, M.E. and
Iizuka, Y. (2016) Matyhite, IMA 2015-121. CNMNC Newsletter No. 31, June 2016,
page 692; Mineralogical Magazine, 80, 691–697.
IMA No. 2015-122
Huenite
Cu4(MoO4)3(OH)2
San Samuel Mine, Carrera Pinto, Cachiyuyo de Llampos district, Copiapó Province,
Atacama Region, Chile (27°4′40″S, 70°0′10″W)
Pietro Vignola*, G. Diego Gatta, Marco Merlini, Nicola Rotiroti, Frédéric
Hatert, Danilo Bersani, Andrea Risplendente, Paolo Gentile and Alessandro Pavese
*E-mail: pietro.vignola@idpa.cnr.it
Chemically related to lindgrenite
Trigonal: P31/c; structure determined
a = 7.728(5), c = 9.504(6) Å
6.786(25), 5.372(24), 3.810(51), 2.974(100), 2.702(41), 2.497(38), 1.712(60),
1.450(37)
Type material is deposited in the mineralogical collections of the Laboratoire
de Minéralogie, University of Liège, Belgium, catalogue no. 20399
How to cite: Vignola, P., Gatta, G.D., Merlini, M., Rotiroti, N., Hatert, F.,
Bersani, D., Risplendente, A., Gentile, P. and Pavese, A. (2016) Huenite, IMA
2015-122. CNMNC Newsletter No. 31, June 2016, page 692; Mineralogical Magazine,
80, 691–697.
IMA No. 2015-123
Braunerite
K2Ca(UO2)(CO3)3·6H2O
Svornost mine, Jáchymov ore district, Western Bohemia, Czech Republic
(50°22′21″N, 12°54′42″E)
Jakub Plášil*, Kurt Mereiter, Anthony R. Kampf, Jan Hloušek, Radek Škoda, Jiří
Čejka, Ivan Němec and Jana Ederová
*E-mail: plasil@fzu.cz
New structure type
Monoclinic: P21/c; structure determined
a = 17.6725(12), b = 11.6065(5), c = 29.673(3) Å, β = 101.780(8)°
14.64(100), 7.29(65), 7.04(20), 6.25(15), 5.71(28), 4.991(18), 4.860(18),
4.118(50)
Type material is deposited in the collections of the Department of Mineralogy
and Petrology, National Museum, Cirkusová 1740, Prague 9, Czech Republic,
catalogue number P1P 14/2015, and the Natural History Museum of Los Angeles
County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number
65631
How to cite: Plášil, J., Mereiter, K., Kampf, A.R., Hloušek, J., Škoda, R.,
Čejka, J., Němec, I. and Ederová, J. (2016) Braunerite, IMA 2015-123. CNMNC
Newsletter No. 31, June 2016, page 692; Mineralogical Magazine, 80, 691–697.
IMA No. 2015-124
Wayneburnhamite
Pb9Ca6(Si2O7)4(SiO4)O
Commercial quarry, Crestmore, Sky Blue Hill, Riverside Co., California, USA
(34°01′24.6″N, 117°23′04.6″W)
Anthony R. Kampf*, Robert M. Housley and George R. Rossman
*E-mail: akampf@nhm.org
Isostructural with ganomalite
Hexagonal: P-6
structure determined
a = 9.8953(9), c = 10.2054(7) Å
4.95(52), 4.45(64), 3.550(77), 3.232(54), 3.086(100), 2.847(60), 2.798(48),
2.734(83)
Type material is deposited in the collections of the Mineral Sciences
Department, Natural History Museum of Los Angeles County, 900 Exposition
Boulevard, Los Angeles, California 90007, USA, catalogue numbers 65639
(holotype) and 65640 (cotype)
How to cite: Kampf, A.R., Housley, R.M. and Rossman, G.R. (2016)
Wayneburnhamite, IMA 2015-124. CNMNC Newsletter No. 31, June 2016, page 693;
Mineralogical Magazine, 80, 691–697.
IMA No. 2015-125
Cardite
Zn5.5(AsO4)2(AsO3OH)(OH)3·3H2O
Block 14 Opencut, Broken Hill, New South Wales, Australia (31°57′33″S,
141°28′30″E)
Peter Elliott*
*E-mail: peter.elliott@adelaide.edu.au
New structure type
Orthorhombic: Cmcm; structure determined
a = 15.110(3), b = 15.492(3), c = 6.385(1) Å
10.783(100), 7.564(85), 4.143(48), 3.328(31), 3.012(20), 2.763(31), 2.668(24),
2.451(21)
Type material is deposited in the mineralogical collections of the South
Australian Museum, Adelaide, Australia, registration number G34301
How to cite: Elliott, P. (2016) Cardite, IMA 2015-125. CNMNC Newsletter No. 31,
June 2016, page 693; Mineralogical Magazine, 80, 691–697.
IMA No. 2015-126
Selivanovaite
(Na,Ca)3(Ti,Fe)5[Si4O18(OH)3]·7H2O
In drill cores (100–130 m underground) at the Lovozero Eudialyte Complex, Mt.
Alluaiv, Kola Peninsula, Russia
Yakov A. Pakhomovsky, Taras L. Panikirovskii, Victor N. Yakovenchuk, Gregory Y.
Ivanyuk*, Julia A. Mikhailova, Sergei V. Krivovichev and Vladimir N. Bocharov
*E-mail: ivanyuk@geoksc.apatity.ru
New structure type
Triclinic: P-1
a = 8.671(1), b = 8.686(1), c = 12.217 (1) Å, α = 92.68(1), β = 108.52(1),
γ = 105.42(1)°
11.43(100), 6.37(25), 5.73(15), 4.208(16), 3.108(35), 3.043(20), 2.596(17),
2.496(14)
Type material is deposited in the collections of the Mineralogical Museum, St.
Petersburg State University, St. Petersburg, Russia, catalogue no. 19649, and
the Geological and the Mineralogical Museum, Geological Institute, Kola Science
Centre, Apatity, Russia, catalogue no. 7538
How to cite: Pakhomovsky, Y.A., Panikirovskii, T.L., Yakovenchuk, V.N., Ivanyuk,
G.Y., Mikhailova, J.A., Krivovichev, S.V. and Bocharov, V.N. (2016)
Selivanovaite, IMA 2015-126. CNMNC Newsletter No. 31, June 2016, page 693;
Mineralogical Magazine, 80, 691–697.
IMA No. 2015-127
Příbramite
CuSbSe2
At the mine dump of shaft No. 16 – Háje, near Příbram, Central Bohemia, Czech
Republic (49°40′33.894″N, 14°3′29.922″E)
Pavel Škácha*, Jiří Sejkora and Jakub Plášil
*E-mail: skacha-p@muzeum-pribram.cz
The Se analogue of chalcostibite
Orthorhombic: Pnma; structure determined
a = 6.304(1), b = 3.980(1), c = 14.989(4) Å
3.152(40), 3.113(100), 3.085(40), 3.070(30), 2.394(63), 1.990(38), 1.844(42),
1.833(33)
Cotype material is deposited in the collections of the Department of Mineralogy
and Petrology, National Museum, Cirkusová 1740, Praha 9, Czech Republic,
catalogue number P1P 15/2015, and the Mining Museum Příbram, Czech Republic,
catalogue number 1/2016
How to cite: Škácha, P., Sejkora, J. and Plášil, J. (2016) Příbramite, IMA
2015-127. CNMNC Newsletter No. 31, June 2016, page 693; Mineralogical Magazine,
80, 691–697.
IMA No. 2015-128
Leoszilardite
Na6Mg(UO2)2(CO3)6·6H2O
Markey Mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA
(37°32′57″N, 110°18′2″W)
Travis A. Olds*, Luke Sadergaski, Jakub Plášil, Anthony R. Kampf, Peter C.
Burns, Ian M. Steele and Joe Marty
*E-mail: tolds@nd.edu
New structure type
Monoclinic: C2/m; structure determined
a = 11.609(2), b = 6.784(1), c = 15.106(3) Å, β = 91.378(3)°
7.59(36), 5.46(100), 4.64(28), 3.82(30), 3.383(33), 3.105(25), 2.864(31),
2.028(28)
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 number 65645.
How to cite: Olds, T.A., Sadergaski, L., Plášil, J., Kampf, A.R., Burns, P.C.,
Steele, I.M. and Marty, J. (2016) Leoszilardite, IMA 2015-128. CNMNC Newsletter
No. 31, June 2016, page 694; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-001
Whiteite-(CaMgMg)
CaMg3Al2(PO4)4(OH)2·8H2O
Northern Belle mine (aka Argentum mine), Candelaria district, Mineral Co.,
Nevada, USA (38°9′22″N, 118°5′8″W)
Anthony R. Kampf*, Paul M. Adams and Barbara P. Nash
*E-mail: akampf@nhm.org
Jahnsite group
Monoclinic: P2/a; structure determined
a = 14.824(2), b = 7.0302(3), c = 9.946(3) Å, β = 110.115(12)°
9.20(82), 4.88(64), 3.510(35), 2.936(40), 2.849(45), 2.805(100), 2.549(34),
1.953(35)
Cotype material is deposited in the collections of the Mineral Sciences
Department, Natural History Museum of Los Angeles County, 900 Exposition
Boulevard, Los Angeles , California 90007, USA, catalogue numbers 65642 and
65643
How to cite: Kampf, A.R., Adams, P.M. and Nash, B.P. (2016) Whiteite-(CaMgMg),
IMA 2016-001. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical
Magazine, 80, 691–697.
IMA No. 2016-002
Cesiodymite
CsKCu5O(SO4)5
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, Atali A. Agakhanov, Vasiliy O. Yapaskurt,
Dmitry I. Belakovskiy, Marina F. Vigasina, Sergey N. Britvin, Evgeny G. Sidorov
and Dmitry Y. Pushcharovsky
*E-mail: igorpekov@mail.ru
Isostructural with cryptochalcite
Triclinic: P-1
structure determined
a = 10.0682(4), b = 12.7860(7), c = 14.5486(8) Å, α = 102.038(5),
β = 100.847(4), γ = 89.956(4)°
6.95(54), 3.946(100), 3.765(37), 3.404(39), 3.188(50), 3.149(27), 3.104(28),
2.681(31)
Type material is deposited in the collections of the Fersman Mineralogical
Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4842/1
How to cite: Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Yapaskurt, V.O.,
Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Sidorov, E.G. and
Pushcharovsky, D.Y. (2016) Cesiodymite, IMA 2016-002. CNMNC Newsletter No. 31,
June 2016, page 694; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-004
Gauthierite
KPb[(UO2)7O5(OH)7]·8H2O
Shinkolobwe mine, Shaba province, Democratic Republic of Congo (11°02′S,
26°35′E)
Travis A. Olds, Jakub Plášil*, Anthony R. Kampf, Radek Škoda, Peter C. Burns,
Jiří Čejka, Vincent Bourgoin and Jean-Claude Boulliard
*E-mail: plasil@fzu.cz
New structure type
Monoclinic: P21/c; structure determined
a = 29.844(2), b = 14.5368(8), c = 14.0406(7) Å, β = 103.708(6)°
7.28(49), 3.566(67), 3.192(100), 2.541(18), 2.043(14), 2.001(23), 1.962(14),
1.783(17)
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 number 65644
How to cite: Olds, T.A., Plášil, J., Kampf, A.R., Škoda, R., Burns, P.C., Čejka,
J., Bourgoin, V. and Boulliard, J.-C. (2016) Gauthierite, IMA 2016-004. CNMNC
Newsletter No. 31, June 2016, page 695; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-005
Luogufengite
Fe2O3
Menan Volcanic Complex, near Rexburg, Madison Co., Idaho, USA
Huifang Xu* and Seungyeol Lee
*E-mail: hfxu@geology.wisc.edu
A polymorph of hematite and maghemite
Orthorhombic: Pna21; structure determined
a = 5.051(2), b = 8.717(3), c = 9.382(5) Å
3.198(27), 2.944(25), 2.697(100), 2.525(40), 2.437(32), 1.716(24), 1.505(41),
1.455(37)
Type material is deposited in the collections of the Geology Museum of the
Department of Geoscience, University of Wisconsin, 1215 West Dayton Street,
Madison, WI 53706, USA, specimen numbers UWGM 2341, UWGM 2342 and UWGM 2343
How to cite: Xu, H. and Lee, S. (2016) Luogufengite, IMA 2016-005. CNMNC
Newsletter No. 31, June 2016, page 695; Mineralogical Magazine, 80, 691–697.
NEW MINERAL PROPOSALS APPROVED IN MAY 2016
IMA No. 2016-006
Hydroxyferroroméite
(Fe2+1.5□0.5)Sb5+2O6(OH)
Correc d'en Llinassos, near the village of Oms, Pyrénées-Orientales Department,
France (42°32′16″N, 2°42′26″E)
Stuart J. Mills*, Andrew G. Christy, Mike S. Rumsey, John Spratt, Erica
Bittarello, Georges Favreau, Marco E. Ciriotti and Christian Berbain
*E-mail: smills@museum.vic.gov.au
Pyrochlore supergroup
Cubic: Fd-3m
a = 10.25(3) Å
5.971(65), 3.190(63), 3.069(100), 2.681(48), 2.005(63), 1.935(25), 1.785(43)
Type material is deposited in the mineralogical collections of the Museum
Victoria, Melbourne, Victoria, Australia, registration number M53584, and the
Natural History Museum, London, UK, registration number BM2016,2
How to cite: Mills, S.J., Christy, A.C., Rumsey, M.S., Spratt, J., Bittarello,
E., Favreau, G., Ciriotti, M.E. and Berbain, C. (2016) Hydroxyferroroméite, IMA
2016-006. CNMNC Newsletter No. 31, June 2016, page 695; Mineralogical Magazine,
80, 691–697.
IMA No. 2016-007
Wangdaodeite
FeTiO3
In shock veins of the Suizhou L6 meteorite, fell down in the suburb of Suizhou
City, Hubei Province, China
Xiande Xie*, Xiangping Gu, Hexiong Yang, Ming Chen and Kai Li
*E-mail: xdxie@gzb.ac.cn
A dimorph of ilmenite
Trigonal: R3c
a = 5.1158(2), c = 13.7805(6) Å
3.745(72), 2.715(100), 2.562(89), 2.231(57), 1.859(59), 1.619(41), 1.507(44),
1.479(38)
Cotype material is deposited in the mineralogical collections of the Geological
Museum, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511
Kehua Street, Tianhe District, Guangzhou 510640, China, catalogue number 15010,
the Mineral Museum of the University of Arizona, Tucson AZ 85721-0077, USA,
catalogue number 21312, and the RRUFF Project, deposition number R150142
How to cite: Xie, X., Gu, X., Yang, H., Chen, M. and Li, K. (2016) Wangdaodeite,
IMA 2016-007. CNMNC Newsletter No. 31, June 2016, page 695; Mineralogical
Magazine, 80, 691–697.
IMA No. 2016-008
Ferro-ferri-katophorite
Na(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2
Along the eastern flank of the Sierra de Maz, near the town of Villa Unión,
Coronel Felipe Varela department, La Rioja province, Argentina
Fernando Colombo*, Jordi Rius, Elies Molins, Héctor Biglia, Miguel Á. Galliski,
María Florencia Márquez-Zavalía, Edgardo G.A. Baldo and Agustín Kriscautzky
*E-mail: fosfatos@yahoo.com.ar
Amphibole supergroup
Monoclinic: C2/m; structure determined
a = 9.8270(7), b = 18.0300(8), c = 5.316(4) Å, β = 104.626(3)°
8.446(100), 3.405(9), 3.284(14), 3.135(50), 2.815(26), 2.720(18), 2.173(9),
2.026(9)
Type material is deposited in the collections of the Museo de Mineralogía “Dr.
Alfred Stelzner”, Universidad Nacional de Córdoba (Argentina), catalogue number
MS003341
How to cite: Colombo, F., Rius, J., Molins, E., Biglia, H., Galliski, M.Á.,
Márquez-Zavalía, M.F., Baldo, E.G.A. and Kriscautzky, A. (2016)
Ferro-ferri-katophorite, IMA 2016-008. CNMNC Newsletter No. 31, June 2016, page
696; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-009
Hydroxylgugiaite
(Ca,□)2(Si,Be)(Be,Si)2O5(OH)2
1. Langangen, Blåfjell, between Larvik and Porsgrunn, Telemark, Norway
(59°5′31″N, 9°47′35″E, 75 m asl); 2. Saga I quarry, Mørje, Porsgrunn, Telemark,
Norway (59°2′40″N, 9°50′00″, 100 m asl)
Joel Grice*, Roy Kristiansen, Henrik Friis, Ralph Rowe, Mark Cooper, Glenn
Poirier and Panseok Yang
*E-mail: jgrice@mus-nature.ca
Closely related to gugiaite
Tetragonal: P-421m
a = 7.415(1), c = 4.965(1) Å
3.604(27), 2.971(34), 2.755(100), 2.348(17), 2.318(26), 2.212(26), 1.987(19),
1.706(22)
Cotype material is deposited in the mineralogical collections of the Canadian
Museum of Nature, Ottawa, Canada, registration number CMNMC 86555
How to cite: Grice, J., Kristiansen, R., Friis, H., Rowe, R., Cooper, M.,
Poirier, G. and Yang, P. (2016) Hydroxylgugiaite, IMA 2016-009. CNMNC Newsletter
No. 31, June 2016, page 696; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-010
Edtollite
K2NaCu5Fe3+O2(AsO4)4
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, Atali A. Agakhanov, Leonid A. Pautov, Marina
F. Vigasina, Evgeny G. Sidorov, Dmitry A. Ksenofontov, Sergey N. Britvin and
Dmitry Y. Pushcharovsky
*E-mail: igorpekov@mail.ru
New structure type
Triclinic: P-1
structure determined
a = 5.1168(6), b = 9.124(1), c = 9.698(1) Å, α = 110.12(1), β = 102.45(1),
γ = 92.85(1)°
8.79(92), 7.63(41), 5.22(44), 3.427(100), 3.148(64), 2.851(65), 2.569(77),
2.551(40)
Type material is deposited in the collections of the Fersman Mineralogical
Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4851/1
How to cite: Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Pautov, L.A.,
Vigasina, M.F., Sidorov, E.G., Ksenofontov, D.A., Britvin, S.N. and
Pushcharovsky, D.Y. (2016) Edtollite, IMA 2016-010. CNMNC Newsletter No. 31,
June 2016, page 696; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-011
Cabvinite
Th2F7(OH)·3H2O
Su Seinargiu, Sarroch, Cagliari, Sardinia, Italy
Paolo Orlandi, Cristian Biagioni* and Federica Zaccarini
*E-mail: biagioni@dst.unipi.it
New structure type
Tetragonal: I4/m; structure determined
a = 11.3689(2), c = 6.4175(1) Å
8.02(ms), 5.66(w), 3.975(s), 3.595(m), 2.832(m), 2.125(m), 2.056(m), 2.004(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 19711
How to cite: Orlandi, P, Biagioni, C. and Zaccarini, F. (2016) Cabvinite, IMA
2016-011. CNMNC Newsletter No. 31, June 2016, page 696; Mineralogical Magazine,
80, 691–697.
IMA No. 2016-012
Ewingite
Mg8Ca8(UO2)24(CO3)30O4(OH)12(H2O)138
Plavno Mine, Jáchymov ore district, Western Bohemia, Czech Republic
Travis A. Olds*, Jakub Plášil, Anthony R. Kampf, Peter C. Burns, Antonio
Simonetti and Luke R. Sadergaski
*E-mail: tolds@nd.edu
New structure type
Tetragonal: I41/acd; structure determined
a = 35.401(9), c = 48.157(13) Å
17.8(19), 14.3(31), 10.1(74), 8.28(100), 6.61(24), 6.03(30), 5.69(36), 3.772(17)
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 number 65686
How to cite: Olds, T.A., Plášil, J., Kampf, A.R., Burns, P.C., Simonetti, A. and
Sadergaski, L.R. (2016) Ewingite, IMA 2016-012. CNMNC Newsletter No. 31, June
2016, page 697; Mineralogical Magazine, 80, 691–697.
REVISED CHEMICAL FORMULA
A paper on the mineral cairncrossite has been published recently [European
Journal of Mineralogy, 28, 495–505 (2016)] in which the ideal chemical formula
of the mineral is given as Sr2Ca7–xNa2x(Si4O10)4(OH)2(H2O)15–x (with 0 ≤ x ≤ 1).
In this formula Na is present as an essential component (provided that x > 0),
whereas it was lacking in the previously accepted formula of cairncrossite (cf.
CNMNC Newsletter 16). These data were examined carefully by the CNMNC officers
and were considered reliable. Accordingly it was agreed to modify the formula of
cairncrossite in the official IMA List of Minerals.
IMA No. 2015-120
Wrightite
K2Al2O(AsO4)2
In a fumarole at the Second cinder cone of the Northern Breach of the Great
Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka Peninsula, Far-Eastern
Region, Russia (55°41′N, 160°14′E, 1200 m asl)
Andrey P. Shablinskii*, Stanislav K. Filatov, Lidiya P. Vergasova, Evgenia Y.
Avdontseva and Svetlana V. Moskaleva
*E-mail: shablinskii.andrey@mail.ru
New structure type
Orthorhombic: Pnma; structure determined
a = 8.2377(3), b = 5.5731(6), c = 17.683(1) Å
8.77(36), 6.01(18), 4.458(17), 4.097(16), 4.010(19), 3.875(19), 3.003(16),
2.972(100)
Type material is deposited in the collections of the Mineralogical Museum,
Saint-Petersburg State University, University Emb. 7/9, St. Petersburg 199034,
Russia, catalogue number 1/19653
How to cite: Shablinskii, A.P., Filatov, S.K., Vergasova, L.P., Avdontseva, E.Y.
and Moskaleva, S.V. (2016) Wrightite, IMA 2015-120. CNMNC Newsletter No. 31,
June 2016, page 692; Mineralogical Magazine, 80, 691–697.
IMA No. 2015-121
Matyhite
Ca18(Ca,□)2Fe2+2(PO4)14
D'Orbigny angrite, D'Orbigny, Coronel Suaréz, Buenos Aires, Argentina (37°40′S,
61°39′W)
Shyh-Lung Hwang*, Pouyan Shen, Hao-Tsu Chu, Tzen-Fu Yui, Maria Eugenia Varela
and Yoshiyuki Iizuka
*E-mail: slhwang@mail.ndhu.edu.tw
Merrillite group
Trigonal: R3c
a = 10.456(7), c = 37.41(3) Å
6.52(s), 5.24(m), 3.46(s), 3.21(s), 3.02(m), 2.88(vs), 2.75(m), 2.62(vs)
Type material is deposited in the collections of the Naturhistorisches Museum
Wien, Austria, catalogue number Section D′Orbigny C-N1172-NH Wien
How to cite: Hwang, S.-L., Shen, P., Chu, H.-T., Yui, T.-F., Varela, M.E. and
Iizuka, Y. (2016) Matyhite, IMA 2015-121. CNMNC Newsletter No. 31, June 2016,
page 692; Mineralogical Magazine, 80, 691–697.
IMA No. 2015-122
Huenite
Cu4(MoO4)3(OH)2
San Samuel Mine, Carrera Pinto, Cachiyuyo de Llampos district, Copiapó Province,
Atacama Region, Chile (27°4′40″S, 70°0′10″W)
Pietro Vignola*, G. Diego Gatta, Marco Merlini, Nicola Rotiroti, Frédéric
Hatert, Danilo Bersani, Andrea Risplendente, Paolo Gentile and Alessandro Pavese
*E-mail: pietro.vignola@idpa.cnr.it
Chemically related to lindgrenite
Trigonal: P31/c; structure determined
a = 7.728(5), c = 9.504(6) Å
6.786(25), 5.372(24), 3.810(51), 2.974(100), 2.702(41), 2.497(38), 1.712(60),
1.450(37)
Type material is deposited in the mineralogical collections of the Laboratoire
de Minéralogie, University of Liège, Belgium, catalogue no. 20399
How to cite: Vignola, P., Gatta, G.D., Merlini, M., Rotiroti, N., Hatert, F.,
Bersani, D., Risplendente, A., Gentile, P. and Pavese, A. (2016) Huenite, IMA
2015-122. CNMNC Newsletter No. 31, June 2016, page 692; Mineralogical Magazine,
80, 691–697.
IMA No. 2015-123
Braunerite
K2Ca(UO2)(CO3)3·6H2O
Svornost mine, Jáchymov ore district, Western Bohemia, Czech Republic
(50°22′21″N, 12°54′42″E)
Jakub Plášil*, Kurt Mereiter, Anthony R. Kampf, Jan Hloušek, Radek Škoda, Jiří
Čejka, Ivan Němec and Jana Ederová
*E-mail: plasil@fzu.cz
New structure type
Monoclinic: P21/c; structure determined
a = 17.6725(12), b = 11.6065(5), c = 29.673(3) Å, β = 101.780(8)°
14.64(100), 7.29(65), 7.04(20), 6.25(15), 5.71(28), 4.991(18), 4.860(18),
4.118(50)
Type material is deposited in the collections of the Department of Mineralogy
and Petrology, National Museum, Cirkusová 1740, Prague 9, Czech Republic,
catalogue number P1P 14/2015, and the Natural History Museum of Los Angeles
County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number
65631
How to cite: Plášil, J., Mereiter, K., Kampf, A.R., Hloušek, J., Škoda, R.,
Čejka, J., Němec, I. and Ederová, J. (2016) Braunerite, IMA 2015-123. CNMNC
Newsletter No. 31, June 2016, page 692; Mineralogical Magazine, 80, 691–697.
IMA No. 2015-124
Wayneburnhamite
Pb9Ca6(Si2O7)4(SiO4)O
Commercial quarry, Crestmore, Sky Blue Hill, Riverside Co., California, USA
(34°01′24.6″N, 117°23′04.6″W)
Anthony R. Kampf*, Robert M. Housley and George R. Rossman
*E-mail: akampf@nhm.org
Isostructural with ganomalite
Hexagonal: P-6
structure determined
a = 9.8953(9), c = 10.2054(7) Å
4.95(52), 4.45(64), 3.550(77), 3.232(54), 3.086(100), 2.847(60), 2.798(48),
2.734(83)
Type material is deposited in the collections of the Mineral Sciences
Department, Natural History Museum of Los Angeles County, 900 Exposition
Boulevard, Los Angeles, California 90007, USA, catalogue numbers 65639
(holotype) and 65640 (cotype)
How to cite: Kampf, A.R., Housley, R.M. and Rossman, G.R. (2016)
Wayneburnhamite, IMA 2015-124. CNMNC Newsletter No. 31, June 2016, page 693;
Mineralogical Magazine, 80, 691–697.
IMA No. 2015-125
Cardite
Zn5.5(AsO4)2(AsO3OH)(OH)3·3H2O
Block 14 Opencut, Broken Hill, New South Wales, Australia (31°57′33″S,
141°28′30″E)
Peter Elliott*
*E-mail: peter.elliott@adelaide.edu.au
New structure type
Orthorhombic: Cmcm; structure determined
a = 15.110(3), b = 15.492(3), c = 6.385(1) Å
10.783(100), 7.564(85), 4.143(48), 3.328(31), 3.012(20), 2.763(31), 2.668(24),
2.451(21)
Type material is deposited in the mineralogical collections of the South
Australian Museum, Adelaide, Australia, registration number G34301
How to cite: Elliott, P. (2016) Cardite, IMA 2015-125. CNMNC Newsletter No. 31,
June 2016, page 693; Mineralogical Magazine, 80, 691–697.
IMA No. 2015-126
Selivanovaite
(Na,Ca)3(Ti,Fe)5[Si4O18(OH)3]·7H2O
In drill cores (100–130 m underground) at the Lovozero Eudialyte Complex, Mt.
Alluaiv, Kola Peninsula, Russia
Yakov A. Pakhomovsky, Taras L. Panikirovskii, Victor N. Yakovenchuk, Gregory Y.
Ivanyuk*, Julia A. Mikhailova, Sergei V. Krivovichev and Vladimir N. Bocharov
*E-mail: ivanyuk@geoksc.apatity.ru
New structure type
Triclinic: P-1
a = 8.671(1), b = 8.686(1), c = 12.217 (1) Å, α = 92.68(1), β = 108.52(1),
γ = 105.42(1)°
11.43(100), 6.37(25), 5.73(15), 4.208(16), 3.108(35), 3.043(20), 2.596(17),
2.496(14)
Type material is deposited in the collections of the Mineralogical Museum, St.
Petersburg State University, St. Petersburg, Russia, catalogue no. 19649, and
the Geological and the Mineralogical Museum, Geological Institute, Kola Science
Centre, Apatity, Russia, catalogue no. 7538
How to cite: Pakhomovsky, Y.A., Panikirovskii, T.L., Yakovenchuk, V.N., Ivanyuk,
G.Y., Mikhailova, J.A., Krivovichev, S.V. and Bocharov, V.N. (2016)
Selivanovaite, IMA 2015-126. CNMNC Newsletter No. 31, June 2016, page 693;
Mineralogical Magazine, 80, 691–697.
IMA No. 2015-127
Příbramite
CuSbSe2
At the mine dump of shaft No. 16 – Háje, near Příbram, Central Bohemia, Czech
Republic (49°40′33.894″N, 14°3′29.922″E)
Pavel Škácha*, Jiří Sejkora and Jakub Plášil
*E-mail: skacha-p@muzeum-pribram.cz
The Se analogue of chalcostibite
Orthorhombic: Pnma; structure determined
a = 6.304(1), b = 3.980(1), c = 14.989(4) Å
3.152(40), 3.113(100), 3.085(40), 3.070(30), 2.394(63), 1.990(38), 1.844(42),
1.833(33)
Cotype material is deposited in the collections of the Department of Mineralogy
and Petrology, National Museum, Cirkusová 1740, Praha 9, Czech Republic,
catalogue number P1P 15/2015, and the Mining Museum Příbram, Czech Republic,
catalogue number 1/2016
How to cite: Škácha, P., Sejkora, J. and Plášil, J. (2016) Příbramite, IMA
2015-127. CNMNC Newsletter No. 31, June 2016, page 693; Mineralogical Magazine,
80, 691–697.
IMA No. 2015-128
Leoszilardite
Na6Mg(UO2)2(CO3)6·6H2O
Markey Mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA
(37°32′57″N, 110°18′2″W)
Travis A. Olds*, Luke Sadergaski, Jakub Plášil, Anthony R. Kampf, Peter C.
Burns, Ian M. Steele and Joe Marty
*E-mail: tolds@nd.edu
New structure type
Monoclinic: C2/m; structure determined
a = 11.609(2), b = 6.784(1), c = 15.106(3) Å, β = 91.378(3)°
7.59(36), 5.46(100), 4.64(28), 3.82(30), 3.383(33), 3.105(25), 2.864(31),
2.028(28)
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 number 65645.
How to cite: Olds, T.A., Sadergaski, L., Plášil, J., Kampf, A.R., Burns, P.C.,
Steele, I.M. and Marty, J. (2016) Leoszilardite, IMA 2015-128. CNMNC Newsletter
No. 31, June 2016, page 694; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-001
Whiteite-(CaMgMg)
CaMg3Al2(PO4)4(OH)2·8H2O
Northern Belle mine (aka Argentum mine), Candelaria district, Mineral Co.,
Nevada, USA (38°9′22″N, 118°5′8″W)
Anthony R. Kampf*, Paul M. Adams and Barbara P. Nash
*E-mail: akampf@nhm.org
Jahnsite group
Monoclinic: P2/a; structure determined
a = 14.824(2), b = 7.0302(3), c = 9.946(3) Å, β = 110.115(12)°
9.20(82), 4.88(64), 3.510(35), 2.936(40), 2.849(45), 2.805(100), 2.549(34),
1.953(35)
Cotype material is deposited in the collections of the Mineral Sciences
Department, Natural History Museum of Los Angeles County, 900 Exposition
Boulevard, Los Angeles , California 90007, USA, catalogue numbers 65642 and
65643
How to cite: Kampf, A.R., Adams, P.M. and Nash, B.P. (2016) Whiteite-(CaMgMg),
IMA 2016-001. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical
Magazine, 80, 691–697.
IMA No. 2016-002
Cesiodymite
CsKCu5O(SO4)5
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, Atali A. Agakhanov, Vasiliy O. Yapaskurt,
Dmitry I. Belakovskiy, Marina F. Vigasina, Sergey N. Britvin, Evgeny G. Sidorov
and Dmitry Y. Pushcharovsky
*E-mail: igorpekov@mail.ru
Isostructural with cryptochalcite
Triclinic: P-1
structure determined
a = 10.0682(4), b = 12.7860(7), c = 14.5486(8) Å, α = 102.038(5),
β = 100.847(4), γ = 89.956(4)°
6.95(54), 3.946(100), 3.765(37), 3.404(39), 3.188(50), 3.149(27), 3.104(28),
2.681(31)
Type material is deposited in the collections of the Fersman Mineralogical
Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4842/1
How to cite: Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Yapaskurt, V.O.,
Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Sidorov, E.G. and
Pushcharovsky, D.Y. (2016) Cesiodymite, IMA 2016-002. CNMNC Newsletter No. 31,
June 2016, page 694; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-004
Gauthierite
KPb[(UO2)7O5(OH)7]·8H2O
Shinkolobwe mine, Shaba province, Democratic Republic of Congo (11°02′S,
26°35′E)
Travis A. Olds, Jakub Plášil*, Anthony R. Kampf, Radek Škoda, Peter C. Burns,
Jiří Čejka, Vincent Bourgoin and Jean-Claude Boulliard
*E-mail: plasil@fzu.cz
New structure type
Monoclinic: P21/c; structure determined
a = 29.844(2), b = 14.5368(8), c = 14.0406(7) Å, β = 103.708(6)°
7.28(49), 3.566(67), 3.192(100), 2.541(18), 2.043(14), 2.001(23), 1.962(14),
1.783(17)
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 number 65644
How to cite: Olds, T.A., Plášil, J., Kampf, A.R., Škoda, R., Burns, P.C., Čejka,
J., Bourgoin, V. and Boulliard, J.-C. (2016) Gauthierite, IMA 2016-004. CNMNC
Newsletter No. 31, June 2016, page 695; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-005
Luogufengite
Fe2O3
Menan Volcanic Complex, near Rexburg, Madison Co., Idaho, USA
Huifang Xu* and Seungyeol Lee
*E-mail: hfxu@geology.wisc.edu
A polymorph of hematite and maghemite
Orthorhombic: Pna21; structure determined
a = 5.051(2), b = 8.717(3), c = 9.382(5) Å
3.198(27), 2.944(25), 2.697(100), 2.525(40), 2.437(32), 1.716(24), 1.505(41),
1.455(37)
Type material is deposited in the collections of the Geology Museum of the
Department of Geoscience, University of Wisconsin, 1215 West Dayton Street,
Madison, WI 53706, USA, specimen numbers UWGM 2341, UWGM 2342 and UWGM 2343
How to cite: Xu, H. and Lee, S. (2016) Luogufengite, IMA 2016-005. CNMNC
Newsletter No. 31, June 2016, page 695; Mineralogical Magazine, 80, 691–697.
NEW MINERAL PROPOSALS APPROVED IN MAY 2016
IMA No. 2016-006
Hydroxyferroroméite
(Fe2+1.5□0.5)Sb5+2O6(OH)
Correc d'en Llinassos, near the village of Oms, Pyrénées-Orientales Department,
France (42°32′16″N, 2°42′26″E)
Stuart J. Mills*, Andrew G. Christy, Mike S. Rumsey, John Spratt, Erica
Bittarello, Georges Favreau, Marco E. Ciriotti and Christian Berbain
*E-mail: smills@museum.vic.gov.au
Pyrochlore supergroup
Cubic: Fd-3m
a = 10.25(3) Å
5.971(65), 3.190(63), 3.069(100), 2.681(48), 2.005(63), 1.935(25), 1.785(43)
Type material is deposited in the mineralogical collections of the Museum
Victoria, Melbourne, Victoria, Australia, registration number M53584, and the
Natural History Museum, London, UK, registration number BM2016,2
How to cite: Mills, S.J., Christy, A.C., Rumsey, M.S., Spratt, J., Bittarello,
E., Favreau, G., Ciriotti, M.E. and Berbain, C. (2016) Hydroxyferroroméite, IMA
2016-006. CNMNC Newsletter No. 31, June 2016, page 695; Mineralogical Magazine,
80, 691–697.
IMA No. 2016-007
Wangdaodeite
FeTiO3
In shock veins of the Suizhou L6 meteorite, fell down in the suburb of Suizhou
City, Hubei Province, China
Xiande Xie*, Xiangping Gu, Hexiong Yang, Ming Chen and Kai Li
*E-mail: xdxie@gzb.ac.cn
A dimorph of ilmenite
Trigonal: R3c
a = 5.1158(2), c = 13.7805(6) Å
3.745(72), 2.715(100), 2.562(89), 2.231(57), 1.859(59), 1.619(41), 1.507(44),
1.479(38)
Cotype material is deposited in the mineralogical collections of the Geological
Museum, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511
Kehua Street, Tianhe District, Guangzhou 510640, China, catalogue number 15010,
the Mineral Museum of the University of Arizona, Tucson AZ 85721-0077, USA,
catalogue number 21312, and the RRUFF Project, deposition number R150142
How to cite: Xie, X., Gu, X., Yang, H., Chen, M. and Li, K. (2016) Wangdaodeite,
IMA 2016-007. CNMNC Newsletter No. 31, June 2016, page 695; Mineralogical
Magazine, 80, 691–697.
IMA No. 2016-008
Ferro-ferri-katophorite
Na(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2
Along the eastern flank of the Sierra de Maz, near the town of Villa Unión,
Coronel Felipe Varela department, La Rioja province, Argentina
Fernando Colombo*, Jordi Rius, Elies Molins, Héctor Biglia, Miguel Á. Galliski,
María Florencia Márquez-Zavalía, Edgardo G.A. Baldo and Agustín Kriscautzky
*E-mail: fosfatos@yahoo.com.ar
Amphibole supergroup
Monoclinic: C2/m; structure determined
a = 9.8270(7), b = 18.0300(8), c = 5.316(4) Å, β = 104.626(3)°
8.446(100), 3.405(9), 3.284(14), 3.135(50), 2.815(26), 2.720(18), 2.173(9),
2.026(9)
Type material is deposited in the collections of the Museo de Mineralogía “Dr.
Alfred Stelzner”, Universidad Nacional de Córdoba (Argentina), catalogue number
MS003341
How to cite: Colombo, F., Rius, J., Molins, E., Biglia, H., Galliski, M.Á.,
Márquez-Zavalía, M.F., Baldo, E.G.A. and Kriscautzky, A. (2016)
Ferro-ferri-katophorite, IMA 2016-008. CNMNC Newsletter No. 31, June 2016, page
696; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-009
Hydroxylgugiaite
(Ca,□)2(Si,Be)(Be,Si)2O5(OH)2
1. Langangen, Blåfjell, between Larvik and Porsgrunn, Telemark, Norway
(59°5′31″N, 9°47′35″E, 75 m asl); 2. Saga I quarry, Mørje, Porsgrunn, Telemark,
Norway (59°2′40″N, 9°50′00″, 100 m asl)
Joel Grice*, Roy Kristiansen, Henrik Friis, Ralph Rowe, Mark Cooper, Glenn
Poirier and Panseok Yang
*E-mail: jgrice@mus-nature.ca
Closely related to gugiaite
Tetragonal: P-421m
a = 7.415(1), c = 4.965(1) Å
3.604(27), 2.971(34), 2.755(100), 2.348(17), 2.318(26), 2.212(26), 1.987(19),
1.706(22)
Cotype material is deposited in the mineralogical collections of the Canadian
Museum of Nature, Ottawa, Canada, registration number CMNMC 86555
How to cite: Grice, J., Kristiansen, R., Friis, H., Rowe, R., Cooper, M.,
Poirier, G. and Yang, P. (2016) Hydroxylgugiaite, IMA 2016-009. CNMNC Newsletter
No. 31, June 2016, page 696; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-010
Edtollite
K2NaCu5Fe3+O2(AsO4)4
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, Atali A. Agakhanov, Leonid A. Pautov, Marina
F. Vigasina, Evgeny G. Sidorov, Dmitry A. Ksenofontov, Sergey N. Britvin and
Dmitry Y. Pushcharovsky
*E-mail: igorpekov@mail.ru
New structure type
Triclinic: P-1
structure determined
a = 5.1168(6), b = 9.124(1), c = 9.698(1) Å, α = 110.12(1), β = 102.45(1),
γ = 92.85(1)°
8.79(92), 7.63(41), 5.22(44), 3.427(100), 3.148(64), 2.851(65), 2.569(77),
2.551(40)
Type material is deposited in the collections of the Fersman Mineralogical
Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4851/1
How to cite: Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Pautov, L.A.,
Vigasina, M.F., Sidorov, E.G., Ksenofontov, D.A., Britvin, S.N. and
Pushcharovsky, D.Y. (2016) Edtollite, IMA 2016-010. CNMNC Newsletter No. 31,
June 2016, page 696; Mineralogical Magazine, 80, 691–697.
IMA No. 2016-011
Cabvinite
Th2F7(OH)·3H2O
Su Seinargiu, Sarroch, Cagliari, Sardinia, Italy
Paolo Orlandi, Cristian Biagioni* and Federica Zaccarini
*E-mail: biagioni@dst.unipi.it
New structure type
Tetragonal: I4/m; structure determined
a = 11.3689(2), c = 6.4175(1) Å
8.02(ms), 5.66(w), 3.975(s), 3.595(m), 2.832(m), 2.125(m), 2.056(m), 2.004(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 19711
How to cite: Orlandi, P, Biagioni, C. and Zaccarini, F. (2016) Cabvinite, IMA
2016-011. CNMNC Newsletter No. 31, June 2016, page 696; Mineralogical Magazine,
80, 691–697.
IMA No. 2016-012
Ewingite
Mg8Ca8(UO2)24(CO3)30O4(OH)12(H2O)138
Plavno Mine, Jáchymov ore district, Western Bohemia, Czech Republic
Travis A. Olds*, Jakub Plášil, Anthony R. Kampf, Peter C. Burns, Antonio
Simonetti and Luke R. Sadergaski
*E-mail: tolds@nd.edu
New structure type
Tetragonal: I41/acd; structure determined
a = 35.401(9), c = 48.157(13) Å
17.8(19), 14.3(31), 10.1(74), 8.28(100), 6.61(24), 6.03(30), 5.69(36), 3.772(17)
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 number 65686
How to cite: Olds, T.A., Plášil, J., Kampf, A.R., Burns, P.C., Simonetti, A. and
Sadergaski, L.R. (2016) Ewingite, IMA 2016-012. CNMNC Newsletter No. 31, June
2016, page 697; Mineralogical Magazine, 80, 691–697.
REVISED CHEMICAL FORMULA
A paper on the mineral cairncrossite has been published recently [European
Journal of Mineralogy, 28, 495–505 (2016)] in which the ideal chemical formula
of the mineral is given as Sr2Ca7–xNa2x(Si4O10)4(OH)2(H2O)15–x (with 0 ≤ x ≤ 1).
In this formula Na is present as an essential component (provided that x > 0),
whereas it was lacking in the previously accepted formula of cairncrossite (cf.
CNMNC Newsletter 16). These data were examined carefully by the CNMNC officers
and were considered reliable. Accordingly it was agreed to modify the formula of
cairncrossite in the official IMA List of Minerals.