Phase equilibria in the system Rb3PO4-Ba3(PO4)2

被引：8
|
作者：
Radominska, E. [1 ]
Znamierowska, T. [1 ]
Szuszkiewicz, W. [1 ]
机构：
[1] Wroclaw Univ Econ, Fac Engn & Econ, Dept Inorgan Chem, PL-53345 Wroclaw, Poland
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2011年 / 103卷 / 02期
关键词：
Rubidium and barium orthophosphates; BaRbPO4; Phase diagram; X-ray powder diffraction; CRYSTAL-STRUCTURE;
D O I：
10.1007/s10973-010-0962-y
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The system Rb3PO4-Ba-3(PO4)(2) was investigated by thermoanalytical methods, X-ray powder diffraction, ICP, and FT-IR. On the basis of the obtained results its phase diagram was proposed. For this system with one intermediate compound, BaRbPO4, we found that this compound melts congruently at 1700 A degrees C, exhibits a polymorphic transition at 1195 A degrees C and is high-temperature unstable. Also, the intermediate compound was subject to gradual decomposes to Ba-3(PO4)(2) (the solid phase) and vaporization (with conversion of phosphorus and rubidium oxides into vapor phase). We also found that Rb3PO4 melts congruently at 1450 A degrees C and shows a polymorphic transition at 1040 A degrees C. Regarding Ba-3(PO4)(2), we have confirmed that it melts congruently at 1605 A degrees C and exhibits a polymorphic transition at 1360 A degrees C.
引用
收藏
页码：761 / 766
页数：6
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