General Information:
Chemical Formula:(Ag,Cu)10(Zn,Fe)2(As,Sb)4S13
Composition:(Molecular Weight = 1,857.26 gm)Zinc 5.28 %
ZnIron 1.50 %
FeCopper 8.55 %
CuSilver 43.56 %
AgAntimony 6.56 %
SbArsenic 12.10 %
AsSulfur 22.44 %
S Empirical Formula: Ag7.5Cu2.5Zn1.5Fe2+0.5As3SbS13
IMA Status:Approved IMA 1984
Physical Properties: Cleavage:None
Color:gray or black.
Diaphaniety:Opaque
Hardness:3.5 - Copper Penny
Luster:Resinous
Streak:red brown
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