Uytenbogaardtite, from New Bullfrog Mine, Nye County, Nevada, United States of America — Photo: David Hospital - www.purple-sky-minerals.com · CC BY-SA 3.0
Uytenbogaardtite
A soft gray-white silver-gold sulfide — microscopic grains in hydrothermal gold-silver-quartz veins.
Intro adapted from Wikipedia (CC BY-SA).
Uytenbogaardtite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Ag₃AuS₂.
It crystallizes in the cubic crystal system (space group P4_132). It is a member of the Uytenbogaardtite structural group.
Key properties: Mohs hardness 2.
IMA symbol Uyt, IMA status: approved, named in 1977.
Found in low-temperature hydrothermal Au–Ag quartz veins, in part of supergene origin.
It is found associated with Acanthite, Au–Ag alloy, chlorargyrite, naumannite, quartz.
The mineral was named to honor Willem Uytenbogaardt (1918–), Professor of Geology, Technical University, Delft, The Netherlands, prominent ore microscopist.