General Information:
Chemical Formula:
Pb5Sb4S11
Composition:
(Molecular Weight = 1,875.73 gm)
Antimony 25.96 % Sb
Lead 55.23 % Pb
Sulfur 18.80 % S
Empirical Formula:
Pb5Sb4S11
Environment:
Probably identical with boulangerite.
IMA Status:
Not IMA Approved
Physical Properties:
Cleavage:
[???] Good
Color:
lead gray or pink brown.
Density:
6.31
Diaphaniety:
Opaque
Hardness:
2-3 - Gypsum-Calcite
Luster:
Metallic
Streak:
brownish gray
More details...