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"Invisible" gold in covellite (CuS): Synthesis and studies by EPMA, LA-ICP-MS, and XPS techniquesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 июня 2017 г.
- Авторы: Tagirov B.R., Dikov Y.P., Buleev M.I., Koval’chuk E.V., Chareev D.A., Kokh M.A.
- Журнал: Doklady Earth Sciences
- Том: 459
- Номер: 1
- Год издания: 2014
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 1381
- Последняя страница: 1386
- DOI: 10.1134/S1028334X14110087
- Аннотация: Samples of covellite CuS(cr) containing up to 0.3 wt % of gold in “invisible” form were obtained by means of hydrothermal synthesis (450–475°C, 1 kbar) and synthesis in eutectic chloride melts (495°C). The studies using EPMA and LA-ICP-MS techniques showed that gold was uniformly dispersed within the volume of covellite grains and Au content increased with increasing of sulfur fugacity. The XPS-analysis of the samples obtained showed no chemical shift of the Au-4f7/2 line compared to Au and Au2S, whereas a positive chemical shift of this line was revealed for mixed Au-Ag sulfides and tellurides. The obtained data allow one to assume that gold does not occur in covellite as an isomorphous admixture (solid solution) but forms nanoparticles of Au or gold sulfide.
- Добавил в систему: Чареев Дмитрий Александрович