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Formula: (Hg5Cu)CsAs4S12
Sulpharsenite, galkhaite group,
mercury-,
cesium- and arsenic- bearing mineral
Crystal System: Isometric
Specific gravity: 5.4 measured, 5.44 calculated
Hardness: 3
Streak: Orange-yellow
Colour: Dark orange-red
Common impurities: Fe,Se
Environments
Localities
There are two co-type localities, the Khaidarkan Sb-Hg deposit, Kadamjay District, Batken Region, Kyrgyzstan, and the Gal-Khaya
As-Hg-Sb Deposit, Ust-Yansky District, Sakha, Russia.
Galkhaite occurs in the type localities in hydrothermal
mercury-gold deposits as well formed crystals up to
1 cm in size and their aggregates, and also as granular aggregates. Associated minerals include
pyrite, stibnite,
cinnabar, metacinnabar,
aktashite, wakabayashilite,
orpiment, realgar,
getchellite, calcite,
fluorite and quartz. Galkhaite is replaced
in places by cinnabar and metacinnabar
(AM 59.209).
Galkhaite from the Kadamjay District - Image
At the Getchell Mine, Adam Peak, Potosi Mining District, Osgood Mountains, Humboldt County, Nevada, USA, galkhaite is
associated with pyrite, realgar,
stibnite, orpiment,
getchellite, fluorite
and quartz
(HOM).
Galkhaite from the Getchell Mine - Image
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