Authors:Teresa Podhajska-Kaźmierczak and Teresa Znamierowska
In the ternary system MgO−Na2O−P2O5, the system Mg2P2O7−NaPO3 has been examined by thermal and X-ray methods and its phase diagram has been determined. The intermediate compound Na3Mg2P5O16 exists in this system. It melts peritectically at 948 K and decomposes to mixtures of sodium-magnesium metaphosphates and
magnesium pyrophosphate Mg2P2O7.
Authors:Irena Szczygieł, Aleksandra Matraszek, and Teresa Znamierowska
Ce2O3-K2O-P2O5 ternary system has been investigated by thermoanalytical methods (DTA, DSC), powder X-ray diffraction, XPS and IR spectroscopy.
The existence of three double potassium-cerium(III) phosphates has been confirmed and a new binary phosphate K4Ce2P4O15 has been found. Phase diagram and isothermal section at room temperature of the system Ce2O3-K2O-P2O5 have been presented.