General Information:
Chemical Formula:
Cu2(UO2)3(CO3)2O2(OH)2·4(H2O)
Composition:
(Molecular Weight = 1,195.27 gm)
Uranium 59.74 % U
Copper 10.63 % Cu
Hydrogen 0.84 % H
Carbon 2.01 % C
Oxygen 26.77 % O
Empirical Formula:
Cu2(UO2)3(CO3)2O2(OH)2·4(H2O)
Environment:
On pitchblende ore.
IMA Status:
Approved IMA 1970
Locality:
Shinkolobwe, Shaba, Zaire.
Name Origin:
Named for Marcel Roubault (1905-), geologist, University of Nancy, France.
Physical Properties:
Cleavage:
[100] Perfect, [010] Distinct
Color:
grass green or apple green.
Density:
5.02
Habits:
Platy - Sheet forms (e.g. micas)., Rosette - Bundled tabular aggregates resembling rose flower petals.,
Hardness:
3 - Calcite
Luster:
Vitreous - Greasy
Streak:
green
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