Hydrothermal Synthesis and Crystal Structure of CsFe_2~(III) (HPO_4)_2(PO_4)(H_2O)

摘要

Mixed iron cesium hydrogen phosphate CsFe_2(HPO_4)_2(PO_4)(H_2O) was synthesized under hydrothermal conditions from a mixture of Fe_2O_3, Cs_2CO_3, and H_3PO_4 (at 290 deg C for 1 h, followed by rapid cooling to 25 deg C), and its crystal structure was determined (a = 5.021(3) A, b = 15.80(1) A, c = 13.646(8) A, #beta# = 94.49(4) deg, space group P2_1, Z = 4). The structure is formed by orthophosphate tetrahedral and FeO_6 octahedra. Water molecules are coordinated to the iron atom.