General Information:
Chemical Formula:
Cu3Au
Composition:
(Molecular Weight = 387.60 gm)
Copper 49.18 % Cu
Gold 50.82 % Au
Empirical Formula:
Cu3Au
Environment:
Low temperature un-mixing of Au-Cu alloys.
Locality:
Karabaseh and Talnakh deposits, Ural Mountains, Russia.
Name Origin:
Named after its compostion of Au and Cu.
Physical Properties:
Cleavage:
None
Color:
bronze or copper.
Density:
11.5
Diaphaniety:
Opaque
Habits:
Platy - Sheet forms (e.g. micas)., Anhedral Grains - Granular minerals without the expression of crystal shapes,
Hardness:
2-3 - Gypsum-Calcite
Luminescence:
None.
Luster:
Metallic
Streak:
yellow
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