General Information:
Chemical Formula:
PbU++++++4O13·4(H2O)
Composition:
(Molecular Weight = 1,439.37 gm)
Uranium 66.15 % U
Hydrogen 0.56 % H
Lead 14.40 % Pb
Oxygen 18.90 % O
Empirical Formula:
PbU4O13·4(H2O)
Locality:
Shinkolobwe mine, Shaba, Zaire.
Name Origin:
Named for Emile Richet (1884-1938), chief geologist, Union Miniere du Haut Katanga.
Physical Properties:
Cleavage:
[001] Perfect, [010] Fair
Color:
black.
Habits:
Pseudo Hexagonal - Crystals show a hexagonal outline., Tabular - Form dimensions are thin in one direction.,
Hardness:
3.5 - Copper Penny
Luster:
Adamantine
More details...