General Information:
Chemical Formula:
(Au,Te,Pb)3(Cu,Fe)
Composition:
(Molecular Weight = 592.69 gm)
Iron 3.20 % Fe
Copper 7.08 % Cu
Tellurium 21.53 % Te
Lead 34.96 % Pb
Gold 33.23 % Au
Empirical Formula:
AuTePbCu0.66Fe2+0.34
Environment:
Oxidation zone of Au-Te deposits.
IMA Status:
Approved IMA 1979
Locality:
Dalnii Vostok, Kazakhstan.
Name Origin:
Named for Aleksei A. Bogdanov (1907-1971), Russian geologist.
Physical Properties:
Cleavage:
None
Color:
brown, bronze brown, or bluish black.
Diaphaniety:
Opaque
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., Tarnishes - Freshly fractured surfaces form a surface oxidation film,
Hardness:
4-4.5 - Between Fluorite and Apatite
Luster:
Sub Metallic
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