Since 1975,the year in which Herman and Clearfield published the first synthesis of a crystalline cerium(IV)phosphate with a P/Ce molar ratio equal to 2,three decades of fruitless attempts to ascertain the structure of a cerium(IV)bis(phosphate)have elapsed.The First structure of a cerium(IV)phosphate,Ce(PO4)(HPO4)_(0.5)(H2O)_(0.5),has only very recently been published.
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