Rabbittite

General Information:
 Chemical Formula:
Ca3Mg3(UO2)2(CO3)6(OH)4·18(H2O)
 Composition:
(Molecular Weight = 1,485.56 gm)
Calcium 8.09 % Ca
Magnesium 4.91 % Mg
Uranium 32.05 % U 
Hydrogen 2.71 % H 
Carbon 4.85 % C 
Oxygen 47.39 % O 
 Empirical Formula:
Ca3Mg3(UO2)2(CO3)6(OH)4·18(H2O)
 Environment:
Mine wall efflorescence.
 Locality:
Lucky Strick No. 2 mine, Emery County, Utah, USA.
 Name Origin:
Named for John Charles Rabbitt (1907-1957), geologist with the U. S. Geological Survey.
Physical Properties:
 Cleavage:
[001] Perfect, [???] Perfect, [???] Perfect
 Color:
pale green or greenish yellow.
 Density:
2.57 - 2.6, Average = 2.58
 Habits:
Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation., Fibrous - Crystals made up of fibers., Acicular - Occurs as needle-like crystals.
 Hardness:
2.5 - Finger Nail
 Luminescence:
Fluorescent.
 Luster:
Silky
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