Reference:
▪ Filatov, S.K., Karpov, G.A., Shablinskii, A.P., Krivovichev, S.V., Vergasova, L.P., Antonov, A.V. (2016): Ivsite, Na3H(SO4)2, a New Mineral from Volcanic Exhalations of Fumaroles of the Fissure Tolbachik Eruption. Doklady Earth Sciences, 468, 632-635.
Abstract:
Fine-granular (<0.1 mm) flattened colorless transparent crystals of ivsite form white aggregates. The empirical formula (Na2.793Cu0.056)2.849HS2.016O8 is close to the ideal Na3H(SO4)2. The structure was refined up to R = 0.040. Ivsite has a monoclinic symmetry, P21/c, a = 8.655(1) Å, b = 9.652(1) Å, c = 9.147(1) Å, beta = 108.76(1)°, V = 723.61(1) Å3, Z = 4. Na atoms occur at six- and seven-fold sites (NaO6 and NaO7); S atoms, in isolated SO4 tetrahedrons; these polyhedrons form a three-dimensional framework. The diagnostic lines of powder diffraction patterns (d[Å]–I–hkl) are 4.010–53–12-1, 3.949–87–012, 3.768–100–210, 3.610–21–20-2, 3.022–22–031, 2.891–42–22-2, 2.764–49–31-1, and 2.732–70–13-1.
PS: First study on the synthetic analogue:
▪ Catti, M., Ferraris, G., Ivaldi, G. (1979): A very short, and a symmetrical, hydrogen bond in the structure of Na3H(SO4)2 and S-Oh vs O-OH···O correlation. Acta Crystallographica, B35, 525-529.
▪ Filatov, S.K., Karpov, G.A., Shablinskii, A.P., Krivovichev, S.V., Vergasova, L.P., Antonov, A.V. (2016): Ivsite, Na3H(SO4)2, a New Mineral from Volcanic Exhalations of Fumaroles of the Fissure Tolbachik Eruption. Doklady Earth Sciences, 468, 632-635.
Abstract:
Fine-granular (<0.1 mm) flattened colorless transparent crystals of ivsite form white aggregates. The empirical formula (Na2.793Cu0.056)2.849HS2.016O8 is close to the ideal Na3H(SO4)2. The structure was refined up to R = 0.040. Ivsite has a monoclinic symmetry, P21/c, a = 8.655(1) Å, b = 9.652(1) Å, c = 9.147(1) Å, beta = 108.76(1)°, V = 723.61(1) Å3, Z = 4. Na atoms occur at six- and seven-fold sites (NaO6 and NaO7); S atoms, in isolated SO4 tetrahedrons; these polyhedrons form a three-dimensional framework. The diagnostic lines of powder diffraction patterns (d[Å]–I–hkl) are 4.010–53–12-1, 3.949–87–012, 3.768–100–210, 3.610–21–20-2, 3.022–22–031, 2.891–42–22-2, 2.764–49–31-1, and 2.732–70–13-1.
PS: First study on the synthetic analogue:
▪ Catti, M., Ferraris, G., Ivaldi, G. (1979): A very short, and a symmetrical, hydrogen bond in the structure of Na3H(SO4)2 and S-Oh vs O-OH···O correlation. Acta Crystallographica, B35, 525-529.