Tags: Chemical Substance, Mineral.
Autunite (hydrated calcium uranyl phosphate) with formula: Ca(UO2)2(PO4)2·10-12H2O is a yellow – greenish fluorescent mineral with a hardness of 2 – 2½. Autunite crystallizes in the orthorhombic system and often occurs as tabular square crystals. Due to the moderate uranium content of 48.27% it is radioactive and also used as uranium ore. If the mineral dries out it converts to meta-autunite-I which can turn into meta-autunite-II after heating.
