General Information:
Chemical Formula:
Pb(UO2)2(PO4)2·4(H2O)
Composition:
(Molecular Weight = 1,009.26 gm)
Uranium 47.17 % U
Phosphorus 6.14 % P
Hydrogen 0.80 % H
Lead 20.53 % Pb
Oxygen 25.36 % O
Empirical Formula:
Pb(UO2)2(PO4)2·4(H2O)
Environment:
Found in the oxidation zone of a pitchblende-sulfide deposit.
Locality:
Russia.
Name Origin:
Named for Nikolai M. Przhevalsky (1839-1888), Russian explorer.
Physical Properties:
Cleavage:
[001] Distinct
Color:
yellow or bright greenish yellow.
Habits:
Foliated - Two dimensional platy forms., Aggregates - Made of numerous individual crystals or clusters.,
Hardness:
2-3 - Gypsum-Calcite
Luminescence:
Fluorescent.
Luster:
Adamantine - Pearly
Streak:
light yellow
More details...