| Reference Type | Journal (article/letter/editorial) |
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| Title | Megawite, CaSnO3: a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia |
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| Journal | Mineralogical Magazine |
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| Authors | Galuskin, E. V. | Author |
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| Galuskina, I. O. | Author |
| Gazeev, V. M. | Author |
| Dzierżanowski, P. | Author |
| Prusik, K. | Author |
| Pertsev, N. N. | Author |
| Zadov, A. E. | Author |
| Bailau, R. | Author |
| Gurbanov, A. G. | Author |
| Year | 2011 (October) | Volume | 75 |
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| Page(s) | 2563-2572 | Issue | 5 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/rruff_1.0/uploads/MM75_2563.pdf+ |
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| DOI | doi:10.1180/minmag.2011.075.5.2563Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 244174 | Long-form Identifier | mindat:1:5:244174:4 |
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| GUID | e0e90db5-477d-4a52-9730-e8022a015cfb |
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| Full Reference | Galuskin, E. V., Galuskina, I. O., Gazeev, V. M., Dzierżanowski, P., Prusik, K., Pertsev, N. N., Zadov, A. E., Bailau, R., Gurbanov, A. G. (2011) Megawite, CaSnO3: a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. Mineralogical Magazine, 75 (5) 2563-2572 doi:10.1180/minmag.2011.075.5.2563 |
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| Plain Text | Galuskin, E. V., Galuskina, I. O., Gazeev, V. M., Dzierżanowski, P., Prusik, K., Pertsev, N. N., Zadov, A. E., Bailau, R., Gurbanov, A. G. (2011) Megawite, CaSnO3: a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. Mineralogical Magazine, 75 (5) 2563-2572 doi:10.1180/minmag.2011.075.5.2563 |
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| Abstract/Notes | Megawite is a perovskite-group mineral with an ideal formula CaSnO3 that was discovered in altered silicate-carbonate xenoliths in the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus. Russia. Megawite occurs in ignimbrite, where it forms by contact metamorphism at a temperature >800°C and low pressure. The name megawite honours the British crystallographer Helen Dick Megaw (1907—2002) who did pioneering research on perovskite-group minerals. Megawite is associated with spurrite, reinhardbraunsite, rondorfite, wadalite, srebrodolskite, lakargiite, perovskite, kerimasite. elbrusite-(Zr), periclase, hydroxylellestadite, hydrogrossular, ettringite-group minerals, afwillite. hydrocalumite and brucite. Megawite forms pale yellow or colourless crystals up to 15 urn on edge with pseudo-cubic and pseudo-cuboctahedral habits. The calculated density and average refractive index are 5.06 g cm–3 and 1.89, respectively. Megawite is Zr-rich and usually crystallizes on lakargiite. CaZrO3. The main bands in the Raman spectrum of megawite are at: 159, 183, 262, 283, 355, 443. 474, 557 and 705 cm–1. The unit-cell parameters and space group of megawite, derived from electron back scattered diffraction, are: a = 5.555(3), b = 5.708(2), c = 7.939(5) Å, V = 251.8(1) Å3, Pbnm, Z = 4; they are based on an orthorhombic structural model for the synthetic perovskite CaSn0.6Zr0.4O3. |
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