General Information:
Chemical Formula:
As2(Se,S)3
Composition:
(Molecular Weight = 351.55 gm)
Arsenic 42.62 % As
Selenium 50.54 % Se
Sulfur 6.84 % S
Empirical Formula:
As2Se2.25S0.75
IMA Status:
Approved IMA 1985
Physical Properties:
Cleavage:
[010] Perfect
Color:
dark red.
Density:
4.5
Diaphaniety:
Translucent to Subopaque
Hardness:
1-2 - Between Talc and Gypsum
Luster:
Resinous
Streak:
red orange
More details...