General Information:
Chemical Formula:
AgFe2S3
Composition:
(Molecular Weight = 315.76 gm)
Iron 35.37 % Fe
Silver 34.16 % Ag
Sulfur 30.47 % S
Empirical Formula:
AgFe2+2S3
Environment:
Secondary silver sufide in silver-bearing ore deposts.
Locality:
Occurs with pyrargyrite and stephanite at Joachemstal, Bohemia.
Physical Properties:
Cleavage:
[001] Perfect
Color:
blue violet or golden brown.
Density:
4.22
Diaphaniety:
Opaque
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Twinning Common - Crystals are usually twinned.,
Hardness:
1-1.5 - Talc or a little harder
Luminescence:
Non-fluorescent.
Luster:
Metallic
Streak:
black
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