Babkinite

General Information:
 Chemical Formula:
Pb2Bi2(S,Se)3
 Composition:
(Molecular Weight = 975.45 gm)
Bismuth 42.85 % Bi
Lead 42.48 % Pb
Selenium 8.09 % Se
Sulfur 6.57 % S 
 Empirical Formula:
Pb2Bi2S2Se
 Environment:
High temperature Sn-W sulfide deposits.
 IMA Status:
Approved IMA 1994
 Locality:
The Nevskoye deposit in northeastern Russia, 400 km northwest of Magadan, 25 km northwest of Omskukchan and 35 km southwest of the Dukat gold-silver deposit.
 Name Origin:
For P. V. Babkin (1929-1977), noted Russian Geologist and the first investigator of the Nevskoye deposit.
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
silvery gray.
 Density:
8.09
 Diaphaniety:
Opaque
 Habits:
Aggregates - Made of numerous individual crystals or clusters., Platy - Sheet forms (e.g. micas).,
 Hardness:
2 - Gypsum
 Luster:
Metallic
 Streak:
gray
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