Bariandite

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
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