General Information:
Chemical Formula:
(Y,Dy)2(UO2)4(CO3)4(OH)6·11(H2O)
Composition:
(Molecular Weight = 1,834.97 gm)
Dysprosium 4.43 % Dy
Yttrium 7.27 % Y
Uranium 51.89 % U
Hydrogen 1.54 % H
Carbon 2.62 % C
Oxygen 32.26 % O
Empirical Formula:
Y1.5Dy0.5(UO2)4(CO3)4(OH)6·11(H2O)
Environment:
Lower portion of the oxidation zone of a uranium deposit.
IMA Status:
Approved IMA 1981
Locality:
Shinkolobwe, Zaire.
Name Origin:
Named to honor Kutch crystallographier, Johannes Martin Bijvoet (1892-1980).
Physical Properties:
Cleavage:
[001] Perfect
Color:
sulfur yellow.
Density:
3.9
Habits:
Microscopic Crystals - Crystals visible only with microscopes., Tabular - Form dimensions are thin in one direction.,
Hardness:
2 - Gypsum
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
light yellow
More details...