Uytenbogaardtite
Uytenbogaardtite | |
---|---|
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 |
Fracture | Irregular |
Tenacity | Malleable |
Mohs scale hardness | 2 |
Luster | Metallic |
Diaphaneity | Opaque |
Specific gravity | 8.405 |
Pleochroism | Weak |
References | [1][2][3][4][5] |
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).
It forms, together with petzite (Ag3AuTe2) and (Ag3AuSe2) the uytenbogaardtite group. The type locality is , Bengkulu district, Sumatra island, Indonesia.
Common impurities in the uytenbogaardtite are copper, selenium, and tellurium.
It is named after the Dutch mineralogist (1918–2012), Professor of Geology, Technical University, Delft, The Netherlands, prominent ore microscopist.
See also[]
References[]
Categories:
- Silver minerals
- Gold minerals
- Gold(I) compounds
- Sulfide minerals
- Trigonal minerals
- Minerals in space group 161