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Okamoto Y, Akabori M, Motohashi H, et al. X-ray absorption study of molten yttrium trihalides. J Synchrotron Radiat. 2001;8:1191-9doi: 10.1107/s0909049501015059.
Okamoto, Y., Akabori, M., Motohashi, H., Shiwaku, H., & Ogawa, T. (2001). X-ray absorption study of molten yttrium trihalides. Journal of synchrotron radiation, 81191-9. https://doi.org/10.1107/s0909049501015059
Okamoto, Y, et al. "X-ray absorption study of molten yttrium trihalides." Journal of synchrotron radiation vol. 8 (2001): 1191-9. doi: https://doi.org/10.1107/s0909049501015059
Okamoto Y, Akabori M, Motohashi H, Shiwaku H, Ogawa T. X-ray absorption study of molten yttrium trihalides. J Synchrotron Radiat. 2001 Nov 01;8:1191-9. doi: 10.1107/s0909049501015059. Epub 2001 Oct 25. PMID: 11679771.
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J Synchrotron Radiat. 2001 Nov 01;8:1191-9. doi: 10.1107/s0909049501015059. Epub 2001 Oct 25.

X-ray absorption study of molten yttrium trihalides.

Journal of synchrotron radiation

Y Okamoto, M Akabori, H Motohashi, H Shiwaku, T Ogawa

Affiliations

  1. Department of Materials Science, Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan. [email protected]

PMID: 11679771 DOI: 10.1107/s0909049501015059

Abstract

The local structure and structural changes in molten YCl3-LiCl-KCl and molten YBr3-LiBr systems have been investigated by using a high-temperature extended X-ray absorption fine structure (EXAFS) technique. The behaviour of octahedral coordination of the halide ion (Cl(-) and Br(-)) around the Y(3+) ion has been studied by EXAFS of the Y K-absorption edge. The nearest Y(3+)-Cl(-) and Y(3+)-Br(-) distances and coordination numbers of halide ions around the Y(3+) ion do not change by mixing with the alkali halides. The stabilization of the (YCl6)(3-) and (YBr6)(3-) octahedral coordination by adding alkali halides was suggested by decreasing the Debye-Waller factor and the anharmonicity in the nearest Y(3+)-Cl(-) and Y(3+)-Br(-) interactions. The bridging structure of the (YBr6)(3-) octahedra sharing a Br(-) ion in the molten YBr3-LiBr system was studied by EXAFS of the Br K-absorption edge. The coordination number of Y(3+) around the Br(-) ion decreases from 2 in the pure melt to almost 1 in the 30mol% and 15mol% YBr3 melts. This suggests that the bridging is almost broken and the stable octahedron exists freely in the LiBr-rich melts.

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