General Information:
Chemical Formula:
Fe++Fe+++4Sb+++4O12S
Composition:
(Molecular Weight = 990.29 gm)
Iron 28.20 % Fe
Antimony 49.18 % Sb
Sulfur 3.24 % S
Oxygen 19.39 % O
Empirical Formula:
Fe2+Fe3+4Sb4O12S
IMA Status:
Approved IMA 1978
Physical Properties:
Cleavage:
[???] Perfect
Color:
black.
Density:
5.33
Diaphaniety:
Opaque
Hardness:
4-5 - Fluorite-Apatite
Luster:
Metallic
Streak:
black
More details...