Abstract
The system CePO4 — NaPO3 was investigated by differential thermal and X-ray analyses and infrared spectroscopy and its phase diagram was established. The system contains only one intermediate compound, NaCeP2O7, which melts incongruently at 800°. It exhibits a polymorphic transition at 595°. The low-temperature modification has an orthorhombic unit cell with the parameters.a=5.28,b=12.65,c=4.31 Å,a=β=γ=90° andV= 288.1 Å3.
Zusammenfassung
Mittels DTA, Röntgendiffraktion und IR-Spektroskopie wurde das System CePO4 — NaPO3 untersucht und ein Phasendiagramm erstellt. Das System enthält nur die Intermediärverbindung NaCeP2O7, welche bei 800°C inkongruent schmilzt und bei 595°C eine polymorphe Umwandlung zeigt. Die Niedertemperatur-Modifikation besitzt eine rhombische Elementarzelle mit den Parameterna=5.28,b=12.65,c=4.31,α=β=γ=90°, andV=288.1 Å3.
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Szczygiel, I., Znamierowska, T. Phase equilibria in the system CePO4 - NaPO3 . Journal of Thermal Analysis 37, 705–711 (1991). https://doi.org/10.1007/BF01913149
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DOI: https://doi.org/10.1007/BF01913149