Vinciennite

General Information:
 Chemical Formula:
Cu10Fe4Sn(As,Sb)S16
 Composition:
(Molecular Weight = 1,588.95 gm)
Iron 14.06 % Fe
Copper 39.99 % Cu
Tin 7.47 % Sn
Antimony 3.83 % Sb
Arsenic 2.36 % As
Sulfur 32.29 % S 
 Empirical Formula:
Cu10Fe2+4SnAs0.5Sb0.5S16
 IMA Status:
Approved IMA 1984
 Locality:
Chizeuil, Saoneet-Loire, France.
 Name Origin:
Named for Henri Vincienne (1898-1965), French mineralogist.
Physical Properties:
 Cleavage:
None
 Color:
orange.
 Density:
4.29
 Diaphaniety:
Opaque
 Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., ,
 Hardness:
4.5 - Between Fluorite and Apatite
 Luster:
Metallic
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