Rameauite

General Information:
 Chemical Formula:
K2CaU++++++6O20·9(H2O)
 Composition:
(Molecular Weight = 2,028.57 gm)
Potassium 3.85 % K 
Calcium 1.98 % Ca
Uranium 70.40 % U 
Hydrogen 0.89 % H 
Oxygen 22.87 % O 
 Empirical Formula:
K2CaU6O20·9(H2O)
 Environment:
On pitchblende.
 IMA Status:
Approved IMA 1972
 Locality:
Margnac uranium deposit, Haute Vienne, Massif Central, France.
 Name Origin:
Named for Jacques Rameau (1926-1960), French prospector who discovered the deposit where the mineral occurs.
Physical Properties:
 Cleavage:
[010] Good
 Color:
orange.
 Density:
5.6
 Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Pseudo Hexagonal - Crystals show a hexagonal outline.,
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