The study of CsI-EuI2 binary system

Abstract

The CsI-EuI2 system has been studied by differential thermal analysis and X-ray powder diffraction Guinier techniques. The phase diagram belong to eutectic type with three componunds. The CsEuI3 and Cs3EuI5 are congruent compounds, their melting points are 915K and 814K respectifly, the CsEu2T5 is one incongruent compound, peritectic point is 744K. There are two eutectic species, their eutectic points occur at 738K and 804K with 14.3 mol% CsI and 72.5mol% CsI. The crystal structural investigation of Cs3EuI5 show that it is hexagonal system: a=1.4634(4)nm, c=1.8376(0)nm, Dc=4.619g.cm^-^3, Dm^2^9^8=4.549g.cm^-^3. The valence of europinum in Cs3EuI5 has been determined by magnetic susceplibility, XPS and fluorescence spectry.

Key words: BINARY SYSTEM, CRYSTAL STRUCTURE, X-RAY DIFFRACTION ANALYSIS, X-RAY PHOTOELECTRON SPECTROMETRY, DIFFERENTIAL THERMAL ANALYSIS, PHASE DIAGRAM, CESIUM IODIDE

CLC Number:

O642

Cite this article

REN GUANGMING;JIANG SHENGBANG;WANG SHIHUA. The study of CsI-EuI2 binary system[J]. Acta Chimica Sinica, 1995, 53(10): 947-951.

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CsI-EuI2二元系相图研究