First occurrence of kitagohaite, Pt7 Cu, from the Quadrilátero Ferrífero, Brazil.
A kitagohaite grain, measuring approximately 1.0 mm, was retrieved from an alluvial gold gravity concentrate from the southeastern Quadrilátero Ferrífero (QFe), Mariana, Brazil. The grain exhibits a cubic structure, whitish-steel-gray, and has a metallic luster. It is composed of Wt. 94.42% Pt and 5...
| Autores: | , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | Brasil |
| Recursos: | Universidade Federal de Ouro Preto (UFOP) |
| Repositorio: | Repositório Institucional da UFOP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.ufop.br:123456789/20091 |
| Acesso em linha: | https://www.repositorio.ufop.br/handle/123456789/20091 https://doi.org/10.1590/0370-44672023770030 |
| Access Level: | acceso abierto |
| Palavra-chave: | Kitagohaite Platinum grain Jacutinga Quadrilátero Ferrífero |
| Resumo: | A kitagohaite grain, measuring approximately 1.0 mm, was retrieved from an alluvial gold gravity concentrate from the southeastern Quadrilátero Ferrífero (QFe), Mariana, Brazil. The grain exhibits a cubic structure, whitish-steel-gray, and has a metallic luster. It is composed of Wt. 94.42% Pt and 5.56% Cu (n=9), yielding the empirical formula Pt6.78Cu1.22. This groundbreaking discovery marks the first documented occurrence of kitagohaite in South America. This hydro- thermal deposition of kitagohaite indicates that its mineralization is constrained to temperatures <500o C, as inferred by the stability of synthetic Pt7 Cu. |
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