General Information:
Chemical Formula:
Cu9Ag5HgS8
Composition:
(Molecular Weight = 1,568.37 gm)
Copper 36.47 % Cu
Silver 34.39 % Ag
Mercury 12.79 % Hg
Sulfur 16.36 % S
Empirical Formula:
Cu9Ag5HgS8
IMA Status:
Approved IMA 1973
Locality:
Sedmochislenitsi mine, Vratsa district, Balkan Mountains, Bulgaria.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
None
Color:
gray or steel gray.
Density:
6.318
Diaphaniety:
Opaque
Habits:
Microscopic Crystals - Crystals visible only with microscopes., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
3.5 - Copper Penny
Luster:
Metallic
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