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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