CRYSTAL CHEMISTRY OF CR3+ - V3+-RICH CLINOPYROXENES
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dc.contributor.author | Secco L. | |
dc.contributor.author | Martignago F. | |
dc.contributor.author | Dal Negro A. | |
dc.contributor.author | Reznitskii L.Z. | |
dc.contributor.author | Sklyarov E.V. | |
dc.date.accessioned | 2021-09-28T02:28:14Z | |
dc.date.available | 2021-09-28T02:28:14Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=14041272 | |
dc.identifier.citation | American Mineralogist, 2002, 87, 5-6, 709-714 | |
dc.identifier.issn | 0003-004X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/30610 | |
dc.description.abstract | Eleven clinopyroxenes from the Sludyanka Crystalline Complex in Russia belonging to the ternary join crystal diffractometry and electron probe microanalysis. The crystal chemical data show that the T site is almost completely occupied by Si, so that the Na (V3+.Cr3+) → Ca Mg substitution mechanism ensures charge balance. Changes in M1 site geometry are explained by the aggregate ionic radius, and are influenced by Mg occupancy and V3+/(V3+ + Cr3+) ratio. The M2 site geometry depends both on Na content and on the (V3+, Cr3+) → Mg substitution in M1 site. Changes in M2-O3cl bond length are mainly related to Na content, whereas the longest M2-O3c2 bond lengths are significantly affected by the V3+/(V3+ + Cr3+) ratio of the M1 site. The T site geometry is affected by chemical and geometrical variations at the M1 and M2 sites, principally the M1 site occupancy. | |
dc.title | CRYSTAL CHEMISTRY OF CR3+ - V3+-RICH CLINOPYROXENES | |
dc.type | Статья |
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