General Information:
Chemical Formula:
Al0.6V8O20·9(H2O)
Composition:
(Molecular Weight = 905.85 gm)
Aluminum 1.79 % Al
Vanadium 44.99 % V
Hydrogen 2.00 % H
Oxygen 51.22 % O
Empirical Formula:
Al0.6V4+8O20·9(H2O)
Environment:
U-V deposit in sandstone.
IMA Status:
Approved IMA 1971
Locality:
Mounana, Gabon.
Name Origin:
Named for Pierre Bariand (1933-), French mineralogist.
Physical Properties:
Cleavage:
[001] Perfect
Color:
blue black.
Density:
2.7
Diaphaniety:
Subopaque
Habits:
Fibrous - Crystals made up of fibers., ,
Luster:
Sub Metallic
Streak:
black
More details...