General Information:
Chemical Formula:
Cu++5(CO3)3(OH)4·6(H2O)
Composition:
(Molecular Weight = 639.86 gm)
Copper 49.66 % Cu
Hydrogen 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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