Coordination change of Te atoms in binary tellurite glasses

Yusuke Himei, Akiyoshi Osaka, Tokuro Nanba, Yoshinari Miura

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Abstract

Coordination changes of Te(+ IV) atoms were derived from Raman and X-ray photoelectron spectra of the binary tellurite glasses containing Li, Na, Ba and Zn. A structure model consistent with the experimental results was proposed. In this model, TeO4 units were converted mainly to O 2 2Te=O and O 1 2Te(=O) O- in the range of lower atomic ratio O/Te, and the rate of increase of TeO3/TeO4 decreased in the range of higher O/Te because of the equilibrium TeO 4 2 ↔ O 2 2TeO. The increase in the fraction of non-bridging oxygen atoms and three-coordinated Te(+ IV) atoms was confirmed by X-ray photoelectron spectra. The fraction of non-bridging oxygen estimated from X-ray photoelectron spectra agreed well with that from the Raman spectra and the model.

Original languageEnglish
Pages (from-to)164-169
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume177
Issue numberC
DOIs
Publication statusPublished - Nov 2 1994

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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