General Information:
Chemical Formula:
(UO2)(CO3)·n(H2O), (n=2?)
Composition:
(Molecular Weight = 366.07 gm)
Uranium 65.02 % U
Hydrogen 1.10 % H
Carbon 3.28 % C
Oxygen 30.59 % O
Empirical Formula:
(UO2)(CO3)·2(H2O)
Environment:
Occurs as crusts on "limonite" and barite at uranium deposits.
IMA Status:
Approved IMA 1976
Locality:
Menzenschwald, Schwarzwald, Germany.
Name Origin:
Named in 1976 for J. Frederic Joliot (1900-1958), French physicist, and I. Joliot-Curie.
Physical Properties:
Cleavage:
[100] Distinct
Color:
lemon yellow.
Density:
4.55
Diaphaniety:
Translucent
Habits:
Spherical - Spherical, rounded aggregates., Scaly - Morphology like fish scales.,
Hardness:
1.5-2 - Talc-Gypsum
Luminescence:
Fluorescent and radioactive.
Streak:
yellow
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