Zellerite

General Information:
 Chemical Formula:
Ca(UO2)(CO3)2·5(H2O)
 Composition:
(Molecular Weight = 520.20 gm)
Calcium 7.70 % Ca
Uranium 45.76 % U 
Hydrogen 1.94 % H 
Carbon 4.62 % C 
Oxygen 39.98 % O 
 Empirical Formula:
Ca(UO2)(CO3)2·5(H2O)
 Environment:
Sediment-hosted uranium deposits.
 IMA Status:
Approved IMA 1966
 Locality:
Lucky Mc mine, Freemont County, and Pat No. 8 mine, Powder River Basin, Wyoming.
 Name Origin:
Named for Howard D. Zeller (1922-), U. S. Geological Survey, who found the mineral.
Physical Properties:
 Cleavage:
None
 Color:
white yellow or lemon.
 Density:
3.25
 Habits:
Acicular - Occurs as needle-like crystals., ,
 Hardness:
2 - Gypsum
 Luminescence:
Weakly Fluorescent.
 Luster:
Earthy (Dull)
 Streak:
white
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