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

共 12 条

[1]

BERAK J, 1967, ANN SOC CHIM POLONOR, V41, P2065

[2]

Berak J., 1991, POL J CHEM, V65, P1137

[3] STUDY OF PHASE-TRANSITIONS IN THE SYSTEM AIBIIPO4 WITH AIBIIPO4 WITH AI = LI, RB AND BII = MG, CA, SR, BA, ZN, CD, PB [J].

ELAMMARI, L ;

ELOUADI, B ;

MULLERVOGT, G .

PHASE TRANSITIONS, 1988, 13 (1-4) :29-32

[4] CRYSTAL-STRUCTURE OF THE ORTHOPHOSPHATE RBBAPO4 [J].

ELAMMARI, L ;

ELOUADI, B .

JOURNAL OF ALLOYS AND COMPOUNDS, 1992, 188 (1-2) :99-101

[5] KNOWLEDGE OF ORTHOPHOSPHATES OF HIGHER ALKALINE-METALS FREE OF WATER - K3PO4, RB3PO4, CS3PO4 [J].

HOPPE, R ;

SEYFERT, HM .

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 1973, B 28 (7-8) :507-508

[6] PHASE EQUILIBRIA AND TIN-ACTIVATED LUMINESCENCE IN SYSTEM CA3(PO4)2-BA3(PO4)2 [J].

KREIDLER, ER .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1971, 118 (06) :923-&

[7]

MCCAULEY RA, 1968, BRIT CERAM TRANS J, V67, P619

[8]

Podhajska-Kazmierczak T, 1999, POL J CHEM, V73, P279

[9]

Sugiyama K., 1990, Mineralogical Journal, V15, P141

[10] Crystal structure of the low-temperature forms of cesium and rubidium orthophosphates [J].

Voronin, V. I. ;

Berger, I. F. ;

Proskurnina, N. V. ;

Sheptyakov, D. V. ;

Goshchitskii, B. N. ;

Burmakin, E. I. ;

Stroev, S. S. ;

Shekhtman, G. Sh. .

INORGANIC MATERIALS, 2008, 44 (06) :646-652

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