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

页码：761 / 766

页数：6

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