Lenaite

General Information:
 Chemical Formula:
AgFeS2
 Composition:
(Molecular Weight = 227.85 gm)
Iron 24.51 % Fe
Silver 47.34 % Ag
Sulfur 28.15 % S 
 Empirical Formula:
AgFe3+S2
 Environment:
In goethite pseudomorphs after magnesian siderite.
 IMA Status:
Approved IMA
 Locality:
Silver-lead deposit in the Verkhoyano-Kolymskaya fold system, of the Lena River basin, Eastern Yakutia, Siberia, Russia.
 Name Origin:
Named after the Lena River.
Physical Properties:
 Cleavage:
None
 Color:
gray.
 Density:
4.57
 Diaphaniety:
Opaque
 Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.,
 Hardness:
4.5 - Between Fluorite and Apatite
 Luminescence:
Non-fluorescent.
 Luster:
Metallic
 Streak:
dark gray
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