Category Sulfide mineral Strunz classification 2.BA.40b Space group R3c | Formula
(repeating unit) Ag3AuS2 Crystal system Trigonal | |
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Crystal class Ditrigonal pyramidal (3m)
H-M symbol: (3m) | ||
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 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
Uytenbogaardtite Wikipedia(Text) CC BY-SA