Urancalcarite

General Information:
 Chemical Formula:
Ca(UO2)3(CO3)(OH)6·3(H2O)
 Composition:
(Molecular Weight = 1,066.26 gm)
Calcium 3.76 % Ca
Uranium 66.97 % U 
Hydrogen 1.13 % H 
Carbon 1.13 % C 
Oxygen 27.01 % O 
 Empirical Formula:
CaUO23(CO3)(OH)6·3(H2O)
 Environment:
Found on uraninite.
 IMA Status:
Approved IMA 1983
 Locality:
Shinkolbwe, Shaba, Zaire.
 Name Origin:
Named for the composition.
Physical Properties:
 Cleavage:
None
 Color:
bright yellow.
 Density:
4.03
 Habits:
Acicular - Occurs as needle-like crystals., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Aggregates - Made of numerous individual crystals or clusters.
 Hardness:
2-3 - Gypsum-Calcite
 Streak:
light yellow
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