General Information:
Chemical Formula:(Fe++,Mg)Fe+++[(UO2)(PO4)]4(OH)·12-13(H2O)
Composition:(Molecular Weight = 1,806.00 gm)Magnesium 0.34 %
MgUranium 52.72 %
U Iron 5.41 %
FePhosphorus 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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