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Non-stoichiometric mixed lead and tin niobates

2004Artigo científico Acesso aberto
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dc.contributor.authorCruz-Lopes, Luísa
dc.contributor.authorSavariault, J.-M
dc.contributor.authorMorais, C.M
dc.contributor.authorFernandez, C
dc.contributor.authorPedrosa de Jesus, J.D
dc.contributor.authorRocha, J
dc.date.accessioned2023-01-13T11:12:51Z
dc.date.available2023-01-13T11:12:51Z
dc.date.issued2004
dc.date.updated2023-01-12T12:44:50Z
dc.description.abstractNovel non-stoichiometric mixed lead and tin niobates with the pyrochlore structure have been synthesized via a solid-state route. The materials have been characterized by bulk chemical analysis, single-crystal and powder X-ray diffraction, 207Pb, 119Sn and 93Nb (single and triple quantum) solid-state NMR spectroscopy. The structures of the new non-stoichiometric mixed lead–tin niobate pyrochlore compounds have been Rietveld refined in the cubic system, space group Fd-3m. The steroactivity of the Sn(II) free electron pair leads to the general formula (Sn1.6−xPbx)(Nb2−ySny)O6.6−0.5y, where x (0–1.6) is the Pb(II) and y (0–0.34) is the Sn(IV) contents. 207Pb, 119Sn and (in particular) 93Nb NMR support the isomorphous substitution of tin for lead in the compounds studied. 93Nb triple-quantum magic-angle spinning NMR spectroscopy show that the materials contain, at least, two distinct niobium sites, in a 2:1 population ratio, which may be associated with different samplept_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCruz, L. P., Savariault, J.-M., Morais, C. M., Fernandez, C., Pedrosa de Jesus, J. D., & Rocha, J. (2004). Non-stoichiometric mixed lead and tin niobates. Journal of Solid State Chemistry, 177(4), 1549–1558. https://doi.org/10.1016/j.jssc.2003.12.010pt_PT
dc.identifier.doi10.1016/j.jssc.2003.12.010pt_PT
dc.identifier.eid2-s2.0-1642462913
dc.identifier.issn0022-4596
dc.identifier.slugcv-prod-1504284
dc.identifier.urihttp://hdl.handle.net/10400.19/7543
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectOxidespt_PT
dc.subjectPyrochlorept_PT
dc.subjectNiobatpt_PT
dc.subjectTinpt_PT
dc.titleNon-stoichiometric mixed lead and tin niobatespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1558pt_PT
oaire.citation.issue4-5pt_PT
oaire.citation.startPage1549pt_PT
oaire.citation.titleJournal of Solid State Chemistrypt_PT
oaire.citation.volume177pt_PT
person.familyNameGonçalves Oliveira Valente da Cruz-Lopes
person.givenNameLuísa Paula
person.identifier.ciencia-id7916-0833-5B38
person.identifier.orcid0000-0001-6502-7202
rcaap.cv.cienciaid7916-0833-5B38 | Luísa Paula Gonçalves Oliveira Valente da Cruz-Lopes
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationfa1274f5-f7f8-4afd-8ed8-5f988d6c7226
relation.isAuthorOfPublication.latestForDiscoveryfa1274f5-f7f8-4afd-8ed8-5f988d6c7226

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