Xilingolite

General Information:
 Chemical Formula:
Pb3Bi2S6
 Composition:
(Molecular Weight = 1,231.96 gm)
Bismuth 33.93 % Bi
Lead 50.46 % Pb
Sulfur 15.62 % S 
 Empirical Formula:
Pb3Bi2S6
 Locality:
Chaobuleng district, Xilingola League, Inner Mongolia, China.
 Name Origin:
Named for the locality.
Physical Properties:
 Color:
lead gray.
 Density:
7.08
 Diaphaniety:
Opaque
 Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., ,
 Hardness:
3 - Calcite
 Luster:
Metallic
 Streak:
gray
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