General Information:
Chemical Formula:
BiVO4
Composition:
(Molecular Weight = 323.92 gm)
Vanadium 15.73 % V
Bismuth 64.52 % Bi
Oxygen 19.76 % O
Empirical Formula:
Bi(VO4)
Environment:
Alteration product of native bismuth associated with bismutite and beyerite. One of 3 BiVO4 polymorphs (clinobisvanite and dreyerite).
Locality:
Oxidized portions of Bi-Ag-U-Ca veins in the Pucher shaft of the Wolfgang Mine, Schneeberg, Saxony, Germany.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[001] Perfect
Color:
yellow brown, dark brown red, pink brown, or reddish brown.
Density:
6.25
Diaphaniety:
Transparent to Opaque
Habits:
Tabular - Form dimensions are thin in one direction., Acicular - Occurs as needle-like crystals., Pulverulent - Forms a loose, poorly-coherent powdery mass.
Hardness:
4 - Fluorite
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Adamantine
Streak:
yellow
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