Parsonsite

General Information:
 Chemical Formula:
Pb2(UO2)(PO4)2·2(H2O)
 Composition:
(Molecular Weight = 910.40 gm)
Uranium 26.15 % U 
Phosphorus 6.80 % P 
Hydrogen 0.44 % H 
Lead 45.52 % Pb
Oxygen 21.09 % O 
 Empirical Formula:
Pb2(UO2)(PO4)2·2(H2O)
Physical Properties:
 Cleavage:
[010] Indistinct
 Color:
brown, greenish brown, yellow, yellow brown, or light yellow.
 Density:
5.72 - 6.29, Average = 6
 Diaphaniety:
Transparent to Translucent
 Habits:
Microscopic Crystals - Crystals visible only with microscopes., ,
 Hardness:
2.5-3 - Finger Nail-Calcite
 Luster:
Subadamantine
 Streak:
white
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