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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