General Information:
Chemical Formula:
PbAs2S4
Composition:
(Molecular Weight = 485.31 gm)
Arsenic 30.88 % As
Lead 42.69 % Pb
Sulfur 26.43 % S
Empirical Formula:
PbAs2S4
Locality:
Binnental, Valais, Switzerland.
Physical Properties:
Cleavage:
[100] Good
Color:
dear lead gray.
Density:
5.4
Diaphaniety:
Opaque
Habits:
Striated - Parallel lines on crystal surface or cleavage face., Acicular - Occurs as needle-like crystals.,
Hardness:
3 - Calcite
Luster:
Metallic
Streak:
dark brown
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