General Information:
Chemical Formula:
Fe++2Nb2W++++++O10
Composition:
(Molecular Weight = 641.35 gm)
Niobium 28.97 % Nb
Iron 17.42 % Fe
Tungsten 28.67 % W
Oxygen 24.95 % O
Empirical Formula:
Fe2+2Nb2WO10
IMA Status:
Approved IMA
Physical Properties:
Color:
black.
Density:
6.42
Diaphaniety:
Opaque
Hardness:
5.5 - Knife Blade
Luster:
Sub Metallic
More details...