General Information:
Chemical Formula:
Ag3AsS3
Composition:
(Molecular Weight = 494.72 gm)
Silver 65.41 % Ag
Arsenic 15.14 % As
Sulfur 19.44 % S
Empirical Formula:
Ag3AsS3
Name Origin:
After the french chemist, J. L. Proust (1755-1826).
Physical Properties:
Cleavage:
None
Color:
vermilion or reddish gray.
Density:
5.5 - 5.6, Average = 5.55
Diaphaniety:
Transparent to translucent
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., Crystalline - Poor - Occurs primarily as crudely formed crystals., Blocky - Crystal shape tends to be equant (e.g . feldspars).
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
None.
Luster:
Sub Metallic
Streak:
vermilion red
More details...