General Information:
Chemical Formula:
(Fe++,Mg)Fe+++[(UO2)(PO4)]4(OH)·12-13(H2O)
Composition:
(Molecular Weight = 1,806.00 gm)
Magnesium 0.34 % Mg
Uranium 52.72 % U
Iron 5.41 % Fe
Phosphorus 6.86 % P
Hydrogen 1.45 % H
Oxygen 33.22 % O
Empirical Formula:
Fe2+0.75Mg0.25Fe3+(UO2)4(PO4)4(OH)·12.5(H2O)
IMA Status:
Approved IMA
Locality:
Bassett mine, Redruth, Cornwall, England.
Name Origin:
Named for Renard F. C. Vochten (1933-), mineraloigst, State University of Antwerp, Antwerp, Belgium.
Physical Properties:
Cleavage:
[010] Distinct
Color:
bronze brown.
Density:
3.65
Diaphaniety:
Translucent to Opaque
Habits:
Aggregates - Made of numerous individual crystals or clusters., ,
Hardness:
3 - Calcite
Luminescence:
Non-fluorescent.
Luster:
Adamantine - Metallic
Streak:
light brown
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