General Information:
Chemical Formula:
TlPbAs3S6
Composition:
(Molecular Weight = 892.88 gm)
Thallium 22.89 % Tl
Arsenic 25.17 % As
Lead 23.21 % Pb
Sulfur 28.73 % S
Empirical Formula:
TlPbAs3S8
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[???] Good
Color:
brownish black or black.
Diaphaniety:
Subtranslucent to Opaque
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Sub Metallic
Streak:
raspberry red
More details...