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dc.contributor.authorDexpert-Ghys, J.-
dc.contributor.authorRibeiro, SJL-
dc.contributor.authorDugat, P.-
dc.contributor.authorAvignant, D.-
dc.identifier.citationJournal of Materials Chemistry. Cambridge: Royal Soc Chemistry, v. 8, n. 4, p. 1043-1050, 1998.-
dc.description.abstractDuring a study of the LaF3-ZrF4 system, both La3Zr4F25 and alpha-LaZr3F15 compounds have been evidenced. Their crystal structures have been determined from single-crystal X-ray diffraction data. La3Zr4F25 crystallises in the cubic system with a= 12.384 Angstrom and I (4) over bar 3d space group (no. 220). Its crystal structure is built up of (ZrF6)(2-) octahedra and (LaF8)(5-) dodecahedra sharing corners. The low temperature form, alpha, of LaZr3F15 is orthorhombic (space group Pmmn, no. 59) with a = 15.721 Angstrom, b = 16.299 Angstrom, c= 8.438 Angstrom. Its structure is built of corner-sharing tricaped trigonal prisms surrounding the La3+ ions and both octahedra and monocapped trigonal prisms encompassing the Zr4+ ions. This structure is characterised by dynamically disordered (ZrF6)(2-) complex anions.The Eu3+ luminescence properties of these phases have been investigated and are discussed in relationship with their crystal structures.en
dc.publisherRoyal Soc Chemistry-
dc.sourceWeb of Science-
dc.titleCrystal structures and luminescence properties of La3Zr4F25 and alpha-LaZr3F15en
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniv Blaise Pascal-
dc.description.affiliationCNRS, CEMES, F-31055 Toulouse 4, France-
dc.description.affiliationUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil-
dc.description.affiliationUniv Blaise Pascal, UPRESA A6002 CNRS, Lab Mat Inorgan, F-63177 Clermont Ferrand, France-
dc.description.affiliationUnespUNESP, Inst Quim, BR-14800900 Araraquara, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofJournal of Materials Chemistry-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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