Hydrated barium uranyl phosphate of the Autunite group, forming yellow-green, fluorescent, micaceous crystals. It's highly radioactive and associated with potent transformation.
Yellow, Greenish-Yellow, Lemon-Yellow, forms tabular or platy crystals, micaceous, fluoresces strongly green
Uranocircite is classified as a phosphate mineral mineral which typically crystallizes in the tetragonal system. Its chemical formula is Ba(UO2)2(PO4)2·10H2O.