Electronic polarizability, optical basicity, and interaction parameter of La2O3 and related glasses

T. Honma, Y. Benino, T. Fujiwara, T. Komatsu, R. Sato, V. Dimitrov

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)

Abstract

The electronic polarizability and optical basicity of La2O3 and related glasses have been determined from ultraviolet absorption spectra and calculations based on the Lorentz-Lorenz equation. The optical basicity for La2O3 oxide is found to be 1.07, being much larger compared with typical glass-forming oxides such as B2O3 (0.42) and SiO2 (0.48) but being similar to heavy element oxides such as TeO2 (0.93). The Yamashita and Kurosawa's interaction parameter of La2O3 is 0.03 Å-3, indicating that La2O3 is classified as a normal ionic (basic) oxide, i.e., an ionic bonding character in the La3+-O bond is proposed. Close correlations are confirmed among optical basicity, interaction parameter, and oxygen 1s binding energy in x-ray photoelectron (XPS) spectra for La2O3-P2O5 and other La2O3-containing glasses. It is found from XPS and Raman spectra that La3+ ions in La2O3-P2O5 glasses act as network modifiers, supporting an ionic bonding character in the La3+-O bond. The parameters related to electronic polarizability in La2O3 determined in the present study would be useful for the design of rare-earth containing optical functional glasses.

Original languageEnglish
Pages (from-to)2942-2950
Number of pages9
JournalJournal of Applied Physics
Volume91
Issue number5
DOIs
Publication statusPublished - Feb 15 2002
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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