Crystal structures and luminescence properties of La3Zr4F25 and alpha-LaZr3F15
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/04/1998
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Resumo |
During 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. |
Formato |
1043-1050 |
Identificador |
http://dx.doi.org/10.1039/a708080h Journal of Materials Chemistry. Cambridge: Royal Soc Chemistry, v. 8, n. 4, p. 1043-1050, 1998. 0959-9428 http://hdl.handle.net/11449/34646 10.1039/a708080h WOS:000073072600035 |
Idioma(s) |
eng |
Publicador |
Royal Soc Chemistry |
Relação |
Journal of Materials Chemistry |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |