General Information:
Chemical Formula:(UO2)6(SO4)(OH)10·12(H2O)
Composition:(Molecular Weight = 2,102.49 gm)Uranium 67.93 %
U Hydrogen 1.63 %
H Sulfur 1.53 %
S Oxygen 28.92 %
O Empirical Formula: (UO2)6(SO4)(OH)10·12(H2O)
Environment:Secondary mineral found on altering uraninite.
Locality:Jachymov, Bohemia, Czech Republic.
Name Origin:Named for uranium and the Greek for "felt", alluding to the bopositin and habit.
Physical Properties: Cleavage:[010] Perfect
Color:lemon or straw yellow.
Density:3.7 - 4, Average = 3.85
Habits:Encrustations - Forms crust-like aggregates on matrix., Reniform - "Kidney like" in shape (e.g.. hematite).,
Luminescence:Fluorescent, Short UV=bright greenish yellow.
Luster:Silky
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