General Information:
Chemical Formula:
Ag3Pb3Bi9S18 to Ag3Pb6Bi7S18
Composition:
(Molecular Weight = 2,985.26 gm)
Silver 10.84 % Ag
Bismuth 49.00 % Bi
Lead 20.82 % Pb
Sulfur 19.33 % S
Empirical Formula:
Ag3Pb3Bi7S18
Locality:
Treasury lode, Geneva district, Park Co., Colorado, USA.
Name Origin:
Named for J. H. L. Schirmer, superintendent of the U. S. Mint, Denver, Colorado, USA.
Physical Properties:
Cleavage:
None
Color:
lead gray, gray, or iron black.
Density:
6.74
Diaphaniety:
Opaque
Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., ,
Hardness:
2 - Gypsum
Luminescence:
Non-fluorescent.
Luster:
Metallic
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