General Information:
Chemical Formula:
Fe++4Fe+++8Sb+++12O23S2
Composition:
(Molecular Weight = 2,563.28 gm)
Iron 26.14 % Fe
Antimony 57.00 % Sb
Sulfur 2.50 % S
Oxygen 14.36 % O
Empirical Formula:
Fe2+4Fe3+8Sb12O23S2
IMA Status:
Approved IMA 1979
Locality:
Buca della Vena mine, Versilia valley, Apuan Alps, Italy.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[110] Perfect
Color:
black.
Density:
5.12
Diaphaniety:
Opaque
Habits:
Platy - Sheet forms (e.g. micas)., ,
Hardness:
5 - Apatite
Luster:
Metallic
Streak:
black
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