General Information:
Chemical Formula:
Cu3AsS4
Composition:
(Molecular Weight = 393.82 gm)
Copper 48.41 % Cu
Arsenic 19.02 % As
Sulfur 32.57 % S
Empirical Formula:
Cu3AsS4
Name Origin:
Named after the Luzon Island, Phillippines.
Physical Properties:
Cleavage:
None
Color:
gray, dark pink brown, or red.
Density:
4.4 - 4.6, Average = 4.5
Diaphaniety:
Opaque
Habits:
Euhedral Crystals - Occurs as well-formed crystals showing good external form., Granular - Generally occurs as anhedral to subhedral crystals in matrix.,
Hardness:
3.5 - Copper Penny
Luster:
Metallic
Streak:
black
More details...