Ranunculite

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
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