General Information:
Chemical Formula:
HAl(UO2)(PO4)(OH)3·4(H2O)
Composition:
(Molecular Weight = 516.07 gm)
Uranium 46.12 % U
Aluminum 5.23 % Al
Phosphorus 6.00 % P
Hydrogen 2.34 % H
Oxygen 40.30 % O
Empirical Formula:
HAl(UO2)(PO4)(OH)3·4(H2O)
Environment:
In U-rich portions of a pegmatite with other Al-U phosphates.
IMA Status:
Approved IMA 1978
Locality:
Kobokobo, Kivu, Zaire.
Name Origin:
Named for the color "ranunculus", buttercup.
Physical Properties:
Cleavage:
[001] Perfect, [100] Perfect
Color:
golden yellow or canary yellow.
Density:
3.4
Habits:
Nodular - Tuberose forms having irregular protuberances over the surface., Platy - Sheet forms (e.g. micas)., Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Hardness:
3 - Calcite
Luminescence:
Non-fluorescent.
Streak:
light yellow
More details...