Electron Reflection Spectra of Ce³⁺ in BeF₂ and B₂O₃ Melts

A. A. Khokhryakov, A. S. Paivin, S. I. Noritsyn, and S. A. Istomin

Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, ul. Amundsena 101, Yekaterinburg, 620016 Russia

e-mail: khokhryakov@el.ru

Received July 16, 2013

Abstract—The electron spectra of the melts of BeF₂–CeF₃ and B₂O₃–Ce₂O₃ systems have been obtained via
electron reflection spectroscopy in the near UV range. Coordination numbers of cerium(III) ions have been
determined in these systems from spectral data. It has been found that the nephelauxetic shift of interconfigu-
rational 4f 5d electron transitions in cerium ions depends on the degree of covalence of the bonds and the
valence of ligands in complex groups, CeF₆ and CeO₆. It has been shown that the character of spectrograms of
the B₂O₃–Ce₂O₃ melts depends on the preliminary preparation of the components of the mixture. This is related
to the structural heterogeneity of oxide complex groups of cerium(III) ions in borate melts.

Keywords: electron spectra, borate melts, fluoride melts, echanoactivation, structural homogeneity of melts

DOI: 10.1134/S1087659614030109

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