Structural properties of glasses in the series (SrO)x(V2O5)1-x, (SrO)0.5-y(B2O3)y(V2O5)0.5, and (SrO)0.2(B2O3)z(V2O5)0.8-z

G. D. Khattak, Nouar Tabet, L. E. Wenger

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Abstract

In order to further elucidate the local structure of vanadate glasses, x-ray photoelectron spectroscopy (XPS) and magnetization studies are reported on a series of SrO-vanadate and SrO-borovanadate glasses: [(SrO)x(V2O5)1-x], [(SrO)0.5-y(B2O3)y(V2O5)0.5], and [(SrO)0.2(B2O3)z(V2O5)0.8-z]. From the analysis of the XPS spectra for the Sr 3p, B 1s, V 2p, and O 1s core levels, several distinct concentration regimes are identified in terms of various structural units being present. Metavanadate chainlike structures of SrV2O6 and individual VO4 units occur in vanadate glasses with low SrO content x≤0.2 with VO5 polyhedra also appearing at higher SrO content. The SrV2O6 and VOn polyhedra predominate in the low B2O3 containing SrO-borovanadate glasses as the B substitutes into the V sites of the various VOn polyhedra and only when the B2O3 concentration exceeds the SrO content do BOn structures appear. This qualitative picture of three distinct structural groupings for the Sr-vanadate and Sr-borovanadate glasses is consistent with the proposed glass structure based on previous IR and extended x-ray absorption fine structure (EXAFS) studies on these types of vanadate glasses.

Original languageEnglish
Article number104203
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number10
DOIs
Publication statusPublished - 1 Sep 2005
Externally publishedYes

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Vanadates
Structural properties
vanadates
Glass
glass
polyhedrons
Photoelectron spectroscopy
X rays
x ray spectroscopy
photoelectron spectroscopy
Core levels
boron oxide
vanadium pentoxide
x ray absorption
Magnetization
fine structure
substitutes
magnetization

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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title = "Structural properties of glasses in the series (SrO)x(V2O5)1-x, (SrO)0.5-y(B2O3)y(V2O5)0.5, and (SrO)0.2(B2O3)z(V2O5)0.8-z",
abstract = "In order to further elucidate the local structure of vanadate glasses, x-ray photoelectron spectroscopy (XPS) and magnetization studies are reported on a series of SrO-vanadate and SrO-borovanadate glasses: [(SrO)x(V2O5)1-x], [(SrO)0.5-y(B2O3)y(V2O5)0.5], and [(SrO)0.2(B2O3)z(V2O5)0.8-z]. From the analysis of the XPS spectra for the Sr 3p, B 1s, V 2p, and O 1s core levels, several distinct concentration regimes are identified in terms of various structural units being present. Metavanadate chainlike structures of SrV2O6 and individual VO4 units occur in vanadate glasses with low SrO content x≤0.2 with VO5 polyhedra also appearing at higher SrO content. The SrV2O6 and VOn polyhedra predominate in the low B2O3 containing SrO-borovanadate glasses as the B substitutes into the V sites of the various VOn polyhedra and only when the B2O3 concentration exceeds the SrO content do BOn structures appear. This qualitative picture of three distinct structural groupings for the Sr-vanadate and Sr-borovanadate glasses is consistent with the proposed glass structure based on previous IR and extended x-ray absorption fine structure (EXAFS) studies on these types of vanadate glasses.",
author = "Khattak, {G. D.} and Nouar Tabet and Wenger, {L. E.}",
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T1 - Structural properties of glasses in the series (SrO)x(V2O5)1-x, (SrO)0.5-y(B2O3)y(V2O5)0.5, and (SrO)0.2(B2O3)z(V2O5)0.8-z

AU - Khattak, G. D.

AU - Tabet, Nouar

AU - Wenger, L. E.

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N2 - In order to further elucidate the local structure of vanadate glasses, x-ray photoelectron spectroscopy (XPS) and magnetization studies are reported on a series of SrO-vanadate and SrO-borovanadate glasses: [(SrO)x(V2O5)1-x], [(SrO)0.5-y(B2O3)y(V2O5)0.5], and [(SrO)0.2(B2O3)z(V2O5)0.8-z]. From the analysis of the XPS spectra for the Sr 3p, B 1s, V 2p, and O 1s core levels, several distinct concentration regimes are identified in terms of various structural units being present. Metavanadate chainlike structures of SrV2O6 and individual VO4 units occur in vanadate glasses with low SrO content x≤0.2 with VO5 polyhedra also appearing at higher SrO content. The SrV2O6 and VOn polyhedra predominate in the low B2O3 containing SrO-borovanadate glasses as the B substitutes into the V sites of the various VOn polyhedra and only when the B2O3 concentration exceeds the SrO content do BOn structures appear. This qualitative picture of three distinct structural groupings for the Sr-vanadate and Sr-borovanadate glasses is consistent with the proposed glass structure based on previous IR and extended x-ray absorption fine structure (EXAFS) studies on these types of vanadate glasses.

AB - In order to further elucidate the local structure of vanadate glasses, x-ray photoelectron spectroscopy (XPS) and magnetization studies are reported on a series of SrO-vanadate and SrO-borovanadate glasses: [(SrO)x(V2O5)1-x], [(SrO)0.5-y(B2O3)y(V2O5)0.5], and [(SrO)0.2(B2O3)z(V2O5)0.8-z]. From the analysis of the XPS spectra for the Sr 3p, B 1s, V 2p, and O 1s core levels, several distinct concentration regimes are identified in terms of various structural units being present. Metavanadate chainlike structures of SrV2O6 and individual VO4 units occur in vanadate glasses with low SrO content x≤0.2 with VO5 polyhedra also appearing at higher SrO content. The SrV2O6 and VOn polyhedra predominate in the low B2O3 containing SrO-borovanadate glasses as the B substitutes into the V sites of the various VOn polyhedra and only when the B2O3 concentration exceeds the SrO content do BOn structures appear. This qualitative picture of three distinct structural groupings for the Sr-vanadate and Sr-borovanadate glasses is consistent with the proposed glass structure based on previous IR and extended x-ray absorption fine structure (EXAFS) studies on these types of vanadate glasses.

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