|
ИСТИНА |
Войти в систему Регистрация |
ФНКЦ РР |
||
New data on the isomorphism Cu-Fe in sulphides of stannite familyстатья
- Авторы: Evstigneeva T.L., Rusakov V.S., Burkovsky I.A., Kabalov Yu K.
- Сборник: Mineral Deposit at the Beginning of the 21 st Century
- Серия: Mineral Exploration and Sustainable Development
- Год издания: 2022
- Место издания: Krakov Poland
- Первая страница: 1075
- Последняя страница: 1078
- DOI: 10.1201/9781003077503
- Аннотация: 11 compounds of the isomorphous series “Cu3SnS4” – Cu2FeSnS4 (kuramite-stannite) were synthesised by vacuum melting from elements. Four structures of Cu3-xFexSnS4 (x∼0.3, 0.6, 0.8, and 1.0) have been determined using Rietveld method. The sp.group is maintained in all structures. Based on structure refinement and Mössbauer spectroscopy the new scheme of isomorphic replacement Cu-Fe in sulphides of stannite family is proposed. The valence state of Fe in Cu3-xFexSnS4 is changed depending on its content in the phase. The data obtained could be explained only with the supposition that the isomorphous replacement follows the order: 2Cu2+ → Fe3+ at 0< x<0.45 and Cu1+ + Fe3+ → > 2Fe2+ at 0.45<x<0. Therewith the vacations are formed in tetrahedral positions, and ions of Fe3+ occupy the part of octahedral positions 8j.
- Добавил в систему: Русаков Вячеслав Серафимович