Electronic Spectra of Er(III) Ions in Sodium-Borate Melts

A. A. Khokhryakov^a^,^b^,*, A. S. Paivin^a, M. A. Samoilova^a, and V. V. Ryabov^a

^aInstitute of Metallurgy, Ural Branch of Russian Academy of Sciences, Yekaterinburg, 620014 Russia

^bYeltsin Ural Federal University, Yekaterinburg, 620002 Russia

Correspondence to: *e-mail: 9221717036@mail.ru

Received 8 August, 2018

Abstract—In this work, the results of the spectral studies of xNa₂O · (100 – x)B₂O₃ · Er₂O₃ (x = 0–45) melts at 1273 K are presented. When increasing the Na₂O concentration in melts the cyclic changes of the coordination numbers of boron atoms are observed. It is shown that the coordination numbers of the Er(III) ions increase from 6 to 8 in the range from 0 to 12 mol % Na₂O.

Keywords: rare-earth elements, electronic spectra, borate melts, hypersensitive transitions

DOI: 10.1134/S1087659619050079