General Information:
Chemical Formula:
CaZn11(UO2)(CO3)3(OH)20·4(H2O)
Composition:
(Molecular Weight = 1,621.63 gm)
Calcium 2.47 % Ca
Uranium 14.68 % U
Zinc 44.36 % Zn
Hydrogen 1.74 % H
Carbon 2.22 % C
Oxygen 34.53 % O
Empirical Formula:
CaZn11(UO2)(CO3)3(OH)20·4(H2O)
Environment:
Oxidation product of the U dimp material at the mine.
IMA Status:
Approved IMA
Locality:
Lill mine, Pribram, central Bohemia, Czech Republic.
Name Origin:
Named for the composition (Zn, U, Calcium).
Physical Properties:
Cleavage:
[010] Perfect
Color:
white, light yellow, or grayish yellow.
Density:
3.01 - 3.1, Average = 3.05
Diaphaniety:
Translucent
Habits:
Encrustations - Forms crust-like aggregates on matrix., Aggregates - Made of numerous individual crystals or clusters.,
Luminescence:
Fluorescent, Short UV=greenish yellow, Long UV=greenish yellow.
Luster:
Silky
Streak:
white
More details...