General Information:
Chemical Formula:
Bi(Nb,Ta)O4
Composition:
(Molecular Weight = 502.81 gm)
Tantalum 17.99 % Ta
Niobium 27.72 % Nb
Bismuth 41.56 % Bi
Oxygen 12.73 % O
Empirical Formula:
BiNb1.5Ta0.5O4
IMA Status:
Approved IMA 1990
Physical Properties:
Cleavage:
[001] Perfect
Color:
black.
Density:
7.56
Diaphaniety:
Subtranslucent to Opaque
Hardness:
5.5 - Knife Blade
Luster:
Sub Metallic
Streak:
yellowish brown
More details...