General Information:
Chemical Formula:
Cu4(As,Sb)2S5
Composition:
(Molecular Weight = 592.45 gm)
Copper 42.90 % Cu
Antimony 12.33 % Sb
Arsenic 17.70 % As
Sulfur 27.06 % S
Empirical Formula:
Cu4As1.4Sb0.6S5
Environment:
Hydrothermal veins.
IMA Status:
Approved IMA
Locality:
Teine mine, Sapporo, Hokkaido, Japan.
Name Origin:
Named for Takeo Watanabe, (1907-1986), Japanese mineralogist.
Physical Properties:
Cleavage:
None
Color:
lead gray or silver gray.
Density:
4.66
Diaphaniety:
Opaque
Habits:
Microscopic Crystals - Crystals visible only with microscopes., Anhedral Grains - Granular minerals without the expression of crystal shapes,
Hardness:
4-4.5 - Between Fluorite and Apatite
Luster:
Metallic
Streak:
lead gray
More details...