Veenite

General Information:
 Chemical Formula:
Pb2(Sb,As)2S5
 Composition:
(Molecular Weight = 776.08 gm)
Antimony 17.26 % Sb
Arsenic 8.69 % As
Lead 53.40 % Pb
Sulfur 20.66 % S 
 Empirical Formula:
Pb2Sb1.1As0.9S5
 IMA Status:
Approved IMA 1967
 Locality:
Madoc, Ontario, Canada.
 Name Origin:
Named for R. W. Van der Veen (1883-1925), Dutch economic geologist and metallographer.
Physical Properties:
 Cleavage:
None
 Color:
steel gray.
 Density:
5.92
 Diaphaniety:
Opaque
 Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., ,
 Hardness:
3.5-4 - Copper Penny-Flourite
 Luster:
Metallic
 Streak:
black
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