Comparative study of bismuth tellurites by infrared absorption spectroscopy

Zs Szaller, L. Kovács, L. Pöppl

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Infrared spectra of α-Bi2Te4O11, β-Bi2Te4O11, Bi2Te2O7, and Bi2TeO5, have been compared and analyzed. The bands in the region of 620-400 cm-1 correspond to the stretching modes of the bismuth-oxygen framework, while those in the region of 800-620 cm-1 belong to the stretching vibrations of the Te-O bonds. TeO3 polyhedra of trigonal-pyramidal configuration with equal bond lengths (within 0.02 nm) have been found in bismuth tellurites. The largest deformation of TeO3 has been observed in Bi2TeO5 as compared to the other bismuth tellurites investigated in this study. Connected TeO3 polyhedra form Te2O5 groups in the structure of α-Bi2Te4O11. The relation between the frequency of the asymmetric stretching mode and the length of Bi-O bond is linear for Bi2TeO5 and nonlinear for α-Bi2Te4O11 and α-Bi2O3. (C) 2000 Academic Press.

Original languageEnglish
Pages (from-to)392-396
Number of pages5
JournalJournal of Solid State Chemistry
Volume152
Issue number2
DOIs
Publication statusPublished - 2000

Fingerprint

Bismuth
Infrared absorption
Absorption spectroscopy
bismuth
infrared absorption
Stretching
Infrared spectroscopy
absorption spectroscopy
infrared spectroscopy
polyhedrons
Bond length
infrared spectra
Oxygen
Infrared radiation
vibration
oxygen
configurations
tellurous acid

Keywords

  • Bismuth tellurium oxide
  • IR-spectra

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Comparative study of bismuth tellurites by infrared absorption spectroscopy. / Szaller, Zs; Kovács, L.; Pöppl, L.

In: Journal of Solid State Chemistry, Vol. 152, No. 2, 2000, p. 392-396.

Research output: Contribution to journalArticle

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abstract = "Infrared spectra of α-Bi2Te4O11, β-Bi2Te4O11, Bi2Te2O7, and Bi2TeO5, have been compared and analyzed. The bands in the region of 620-400 cm-1 correspond to the stretching modes of the bismuth-oxygen framework, while those in the region of 800-620 cm-1 belong to the stretching vibrations of the Te-O bonds. TeO3 polyhedra of trigonal-pyramidal configuration with equal bond lengths (within 0.02 nm) have been found in bismuth tellurites. The largest deformation of TeO3 has been observed in Bi2TeO5 as compared to the other bismuth tellurites investigated in this study. Connected TeO3 polyhedra form Te2O5 groups in the structure of α-Bi2Te4O11. The relation between the frequency of the asymmetric stretching mode and the length of Bi-O bond is linear for Bi2TeO5 and nonlinear for α-Bi2Te4O11 and α-Bi2O3. (C) 2000 Academic Press.",
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N2 - Infrared spectra of α-Bi2Te4O11, β-Bi2Te4O11, Bi2Te2O7, and Bi2TeO5, have been compared and analyzed. The bands in the region of 620-400 cm-1 correspond to the stretching modes of the bismuth-oxygen framework, while those in the region of 800-620 cm-1 belong to the stretching vibrations of the Te-O bonds. TeO3 polyhedra of trigonal-pyramidal configuration with equal bond lengths (within 0.02 nm) have been found in bismuth tellurites. The largest deformation of TeO3 has been observed in Bi2TeO5 as compared to the other bismuth tellurites investigated in this study. Connected TeO3 polyhedra form Te2O5 groups in the structure of α-Bi2Te4O11. The relation between the frequency of the asymmetric stretching mode and the length of Bi-O bond is linear for Bi2TeO5 and nonlinear for α-Bi2Te4O11 and α-Bi2O3. (C) 2000 Academic Press.

AB - Infrared spectra of α-Bi2Te4O11, β-Bi2Te4O11, Bi2Te2O7, and Bi2TeO5, have been compared and analyzed. The bands in the region of 620-400 cm-1 correspond to the stretching modes of the bismuth-oxygen framework, while those in the region of 800-620 cm-1 belong to the stretching vibrations of the Te-O bonds. TeO3 polyhedra of trigonal-pyramidal configuration with equal bond lengths (within 0.02 nm) have been found in bismuth tellurites. The largest deformation of TeO3 has been observed in Bi2TeO5 as compared to the other bismuth tellurites investigated in this study. Connected TeO3 polyhedra form Te2O5 groups in the structure of α-Bi2Te4O11. The relation between the frequency of the asymmetric stretching mode and the length of Bi-O bond is linear for Bi2TeO5 and nonlinear for α-Bi2Te4O11 and α-Bi2O3. (C) 2000 Academic Press.

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