Uytenbogaardtite
The mineral uytenbogaardtite, Ag3AuS2, is a soft, greyish white sulfide mineral, occurring in hydrothermal Au-Ag-quartz veins. It occurs as tiny crystals, visible only with a microscope. It has a metallic luster and a hardness on the Mohs scale of 2 (gypsum).
| Uytenbogaardite | |
|---|---|
 Uytenbogaardtite, from New Bullfrog Mine, Nye County, Nevada, United States of America | |
| General | |
| Category | Sulfide mineral |
| Formula (repeating unit) | Ag3AuS2 |
| Strunz classification | 2.BA.40b |
| Crystal system | Trigonal |
| Crystal class | Ditrigonal pyramidal (3m) H-M symbol: (3m) |
| Space group | R3c |
| Identification | |
| Formula mass | 584.70 g/mol |
| Color | Greyish white |
| Crystal habit | Microscopic crystals |
| Mohs scale hardness | 2 |
| Luster | Metallic |
| Diaphaneity | Opaque |
| References | [1][2][3][4][5] |
It forms, together with petzite (Ag3AuTe2) and fischesserite (Ag3AuSe2) the uytenbogaardtite group. The type locality is Tambang Sawah, Bengkulu district, Sumatra island, Indonesia.
It is named after the Dutch mineralogist Willem Uytenbogaardt (1918–2012), Professor of Geology, Technical University, Delft, The Netherlands, prominent ore microscopist.
References
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