Phase equilibria in the ErPO4–KPO3 system

The phase equilibria occurring in the ErPO 4 –KPO 3 system were investigated by thermoanalytical, X-ray powder diffraction and FTIR methods. On the basis of the obtained results, its phase diagram was proposed. This system includes one intermediate compound, KErP 2 O 7 . This phosphate decomposes pe...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2016-02, Vol.123 (2), p.1383-1389
Main Authors: Piotrowska, D., Znamierowska, T., Szczygieł, I.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Measurement Science and Instrumentation
Physical Chemistry
Polymer Sciences
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Summary:The phase equilibria occurring in the ErPO 4 –KPO 3 system were investigated by thermoanalytical, X-ray powder diffraction and FTIR methods. On the basis of the obtained results, its phase diagram was proposed. This system includes one intermediate compound, KErP 2 O 7 . This phosphate decomposes peritectically at about 1025 °C and occurs in two polymorphic forms; transformation β/α-KErP 2 O 7 proceeds at about 358 °C. The binary erbium end potassium diphosphate, KErP 2 O 7 , was obtained by the ceramic and modified Pechini methods. Structural properties were characterized by X-ray powder diffraction and FTIR spectroscopy.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-015-5008-z