Инд. авторы:	Palyanova G., Kokh K., Seryotkin Y.
Заглавие:	Transformation of pyrite to pyrrhotite in the presence of Au-Ag alloys at 500 °c
Библ. ссылка:	Palyanova G., Kokh K., Seryotkin Y. Transformation of pyrite to pyrrhotite in the presence of Au-Ag alloys at 500 °c // American Mineralogist. - 2016. - Vol.101. - Iss. 12. - P.2731-2737. - ISSN 0003-004X. - EISSN 1945-3027.
Внешние системы:	DOI: 10.2138/am-2016-5808; SCOPUS: 2-s2.0-85002907201; WoS: 000392291600014;
Реферат:	eng: Dry annealing of AuxAg1-x alloys (x = 0.19, 0.35, 0.56 or of fineness 300, 500, 700‰) and pyrite was used to reveal the solubility of Au (Ag) in FeS2 and study phase equilibria in the FeS2-AuxAgi1-x system at 500 °C. Pyrrhotite, acanthite, and uytenbogaardtite and Au-Ag alloys with increased fineness were established at the contacts of pyrite blocks with Au-Ag plates. The obtained results evidence the absence of solubility between FeS2 and Au (Ag) at 500 °C. The Ag content in alloys influences the stability of pyrite and contributes to its transformation in pyrrhotite and sulfidation and ennobling of Au-Ag alloys. Au-Ag sulfides and pyrrhotite may be present in the sulfide ores of metamorphogene deposits as annealing products of Au-Ag-pyrite-bearing ores. © 2016 by Walter de Gruyter Berlin/Boston 2016.
Ключевые слова:	ennobling of Au-Ag alloys; isomorphism; pyrite; pyrrhotite; visible and 'invisible' gold (silver); thermodiffusion; Au-Ag sulfides; sulfidation; Desulfidation;
Издано:	2016
Физ. характеристика:	с.2731-2737