General Information:
Chemical Formula:Cu6Hg3As4S12
Composition:(Molecular Weight = 1,667.52 gm)Copper 22.86 %
CuMercury 36.09 %
HgArsenic 17.97 %
AsSulfur 23.08 %
S Empirical Formula: Cu6Hg3As4S12
IMA Status:Approved IMA
Locality:TL: Gal-Kyaya deposit, Yakutia, and Aktash deposit, Altai Mts., Russia.
Name Origin:Named after the locality.
Physical Properties: Cleavage:None
Color:grayish black.
Density:5.5
Diaphaniety:Opaque
Habits:Microscopic Crystals - Crystals visible only with microscopes., Anhedral Grains - Granular minerals without the expression of crystal shapes, Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Hardness:3.5 - Copper Penny
Luster:Metallic
Streak:black
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