Bariandite

General Information: Chemical Formula:Al0.6V8O20·9(H2O) Composition:(Molecular Weight = 905.85 gm)Aluminum 1.79 % AlVanadium 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:blackMore details...