General Information:
Chemical Formula:
Ba2(Ta,Nb)2(O,OH)7
IMA Status:
Approved IMA 1977
Physical Properties:
Color:
brown, colorless, yellow, white, or pink brown.
Density:
5.68
Diaphaniety:
Translucent to Opaque
Hardness:
4.5-5
Luster:
Adamantine - Resinous
Streak:
white
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