Uranpyrochlore

General Information:
 Chemical Formula:
(U,Ca,Ca)2(Nb,Ta)2O6(OH,F)
 IMA Status:
Approved IMA 1977
Physical Properties:
 Cleavage:
None
 Color:
yellow brown, red, reddish brown, or black.
 Density:
4.8
 Diaphaniety:
Translucent to Opaque
 Hardness:
5 - Apatite
 Luminescence:
Non-fluorescent.
 Luster:
Resinous
 Streak:
brownish yellow
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