General Information:
Chemical Formula:
AgAsS2
Composition:
(Molecular Weight = 246.92 gm)
Silver 43.69 % Ag
Arsenic 30.34 % As
Sulfur 25.97 % S
Empirical Formula:
AgAsS2
Locality:
Lengenbach, Binnental, Switzerland.
Name Origin:
Named for Charles O. Trechmenn (1851-1917), English mineralogist.
Physical Properties:
Cleavage:
[1011] Good, [0001] Fair
Color:
scarlet red.
Density:
4.78
Diaphaniety:
Translucent
Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
1.5-2 - Talc-Gypsum
Luster:
Adamantine
Streak:
scarlet red
More details...