General Information:
Chemical Formula:
Cu5Se4
Composition:
(Molecular Weight = 633.57 gm)
Copper 50.15 % Cu
Selenium 49.85 % Se
Empirical Formula:
Cu5Se4
IMA Status:
Approved IMA 1969
Locality:
Martin Lake mine, Uranium City, Lake Athabasca, SK, Canada.
Name Origin:
Named for the locality.
Physical Properties:
Color:
blue gray or gray white.
Density:
6.59
Diaphaniety:
Opaque
Habits:
Microscopic Crystals - Crystals visible only with microscopes., Anhedral Grains - Granular minerals without the expression of crystal shapes,
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Metallic
More details...