General Information:
Chemical Formula:
(Fe,Pb)3(Ge,Fe)1-xS4
Composition:
(Molecular Weight = 470.48 gm)
Iron 29.68 % Fe
Germanium 10.03 % Ge
Lead 33.03 % Pb
Sulfur 27.26 % S
Empirical Formula:
Fe2+2.25Pb0.75Ge0.65Fe2+0.25S4
IMA Status:
Approved IMA 1979
Physical Properties:
Cleavage:
None
Color:
brownish gray.
Density:
6.62
Diaphaniety:
Opaque
Hardness:
3.5 - Copper Penny
Luster:
Metallic
Streak:
dark gray
More details...