Local order around tungsten atoms in tungstate fluorophosphate glasses by X-ray absorption spectroscopy

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniv Paris 12
dc.contributorUniv Rennes 1
dc.date.accessioned2014-05-20T15:24:29Z
dc.date.accessioned2022-10-05T16:28:42Z
dc.date.available2014-05-20T15:24:29Z
dc.date.available2022-10-05T16:28:42Z
dc.date.created2014-05-20T15:24:29Z
dc.date.issued2005-11-15
dc.identifierJournal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 351, n. 46-48, p. 3644-3648, 2005.
dc.identifier0022-3093
dc.identifierhttp://hdl.handle.net/11449/35088
dc.identifier10.1016/j.jnoncrysol.2005.08.038
dc.identifierWOS:000233652500013
dc.identifier2998503841917815
dc.identifier6446047463034654
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3907099
dc.description.abstractX-ray absorption spectroscopy was used to study the local environment of tungsten atoms in NaPO3-BaF2,-WO3 glasses and the results were compared with crystalline references Na2WO4 and WO3. XANES measurements at the W-L-1 edge allowed to determine a distorted octahedral environment of tungsten atoms in these glasses similar to the local order of tungsten in monoclinic WO3. Extended X-ray absorption fine structure (EXAFS) has been used as a local probe to monitor the effect of WO3 concentration on the tungsten environment. Based on an analysis of the EXAFS data, we proposed a three-shell model of oxygen atoms around tungsten as in monoclinic WO3. With increasing WO3 concentration, it was found that R-2 decreases from 1.96 to 1.92 angstrom whereas R-3 increases from 2.07 to 2.12 angstrom. (c) 2005 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationJournal of Non-Crystalline Solids
dc.relation2.488
dc.relation0,722
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.titleLocal order around tungsten atoms in tungstate fluorophosphate glasses by X-ray absorption spectroscopy
dc.typeArtigo


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