- a yellow mineral, a hydrous calcium uranium phosphate, CaU2P2O12⋅8H2O, occurring in crystals as nearly square tablets: a minor ore of uranium.
- a yellowish fluorescent radioactive mineral consisting of a hydrated calcium uranium phosphate in tetragonal crystalline form. It is found in uranium ores. Formula: Ca(UO 2) 2 (PO 4) 2 .10–12H 2 O
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