General Information:
Chemical Formula:
YNbO4
Composition:
(Molecular Weight = 245.81 gm)
Yttrium 36.17 % Y
Niobium 37.80 % Nb
Oxygen 26.04 % O
Empirical Formula:
YNbO4
IMA Status:
Approved IMA 1987
Physical Properties:
Cleavage:
[???] Indistinct
Color:
black, black, brown, gray, or yellow.
Density:
4.3 - 5.8, Average = 5.05
Diaphaniety:
Subtranslucent to opaque
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Sub Metallic
Streak:
brown
More details...