On the phase interval PrO1.50 to PrO1.71 in the praseodymium oxide-oxygen system
作者： Rhéal P. Turcotte , Joyce M. Warmkessel , Richard J.D. Tilley , Leroy Eyring
DOI: 10.1016/0022-4596(71)90039-9
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摘要: Phase relationships and phase transitions in the composition region PrO1.50PrO1.71 have been studied by X-ray diffraction analysis on quenched samples situ at high temperatures. An interpretation of results are given terms a metastable set phases including C-form Pr2O3 below 910°C stable A-form above that temperature. Besides these two polymorphic sesquioxides oxygen-rich end member, Pr7O12, widely nonstoichiometric approximate PrO1.67 identified. Thermal expansion measurements made Pr7O12. Hysteresis is clearly indicated high-temperature studies. These contrasted with those recently published emf studies this region.
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