
General Information:

Chemical Formula:
Cu++5(CO3)3(OH)4·6(H2O)

Composition:
(Molecular Weight = 639.86 gm)
Copper 49.66 %
CuHydrogen 2.21 %
H Carbon 5.63 %
C Oxygen 42.51 %
O 
Empirical Formula:
Cu5(CO3)3(OH)2·6(H2O)

Environment:
Amorphous analog of malachite. Weathered tremolitic rock that contains disseminated copper and iron sulfides.

IMA Status:
Approved IMA 1979

Locality:
Carr Boyd mine, 100 km N of Kalgoorlie, WA, Australia.

Name Origin:
Named for George Herbert Payne (1912-1989), past chief of the mineral division, Western Australian Government Chemical Laboratories.
Physical Properties:

Color:
light blue.

Density:
2.55

Diaphaniety:
Transparent to Subopaque

Habits:
Encrustations - Forms crust-like aggregates on matrix., ,

Hardness:
1-2 - Between Talc and Gypsum

Luster:
Vitreous - Dull

Streak:
light blue
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