General Information:
Chemical Formula:Pb2(Sb,As)2S5
Composition:(Molecular Weight = 776.08 gm)Antimony 17.26 %
SbArsenic 8.69 %
AsLead 53.40 %
PbSulfur 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
More details...
