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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