Malanite

General Information:
 Chemical Formula:
Cu(Pt,Ir)2S4
 Composition:
(Molecular Weight = 580.54 gm)
Copper 10.95 % Cu
Iridium 16.56 % Ir
Platinum 50.40 % Pt
Sulfur 22.09 % S 
 Empirical Formula:
CuPt1.5Ir0.5S4
 IMA Status:
Approved IMA 1995
Physical Properties:
 Color:
white or steel gray.
 Density:
7.4
 Diaphaniety:
Opaque
 Hardness:
5 - Apatite
 Luster:
Metallic
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