Phase equilibria in the system CePO4-K3PO4-K4P2O7

摘要

The phase diagram with liquids isotherms and isothermal section at room temperature of the system CePO4-K3PO4-K4P2O7 has been determined by thermal analysis, K4P2O7 powder X-ray diffraction and IR spectroscopy. The system contains two double phosphates: K3Ce(PO4)(2) and K4Ce2P4O15. The first one melts incongruently at 1500degreesC. The other exists only in solid state (below 880degreesC). Two systems: CePO4-K4P2O7 and K3Ce(PO4)(2)-K4P2O7, which are binary only in the subsolidus region, have been found. (C) 2004 Elsevier SAS. All rights reserved.