Synthesis and crystal structure determination of yttrium ultraphosphate YP{sub 5}O{sub 14}
- Laboratoire de Chimie Industrielle, Ecole Nationale d'Ingenieurs de Sfax, Universite de Sfax, BP W 3038, Sfax (Tunisia)
- Laboratoire des Materiaux Inorganiques (UMR CNRS 6002), Universite Blaise Pascal et ENSCCF, F-63177 Aubiere Cedex (France)
The crystal structure of monoclinic YP{sub 5}O{sub 14} (space group C2/c, a=12.919(2) A, b=12.796(4) A, c=12.457(2) A, {beta}=91.30(1){sup o}, Z=8) has been refined from single-crystal X-ray diffraction data. Full-matrix least-squares refinement on F{sup 2} using 2249 independent reflections for 183 refinable parameters results in a final R value of 0.027 ({omega}R=0.069). The structure is isotypic with HoP{sub 5}O{sub 14}. This structure is built up from infinite layers of PO{sub 4} tetrahedra linked through isolated YO{sub 8} polyhedra. The three-dimensional cohesion of the framework results from Y-O-P bridges. This crystal structure refinement leads to the calculated X-ray diffraction powder pattern of this monoclinic polymorph, which has been the starting point of a thorough study of the solid-state synthesis of this ultraphosphate. This investigation further leads to a better outstanding of features observed during the synthesis of powdered samples. The thermal behavior of this ultraphosphate has been studied by DTA and TGA analyses. The infrared and Raman spectroscopic characterizations have been carried out on polycrystalline samples. The luminescence properties of the Eu{sup 3+} ion incorporated in the monoclinic C2/c polymorph of YP{sub 5}O{sub 14} as local structural probe show that in YP{sub 5}O{sub 14}: 5% Eu{sup 3+} sample, the Eu{sup 3+} ions are distributed over the two Y{sup 3+} crystallographic sites of C{sub 2} symmetry of this structure. - Graphical Abstract: The crystal structure of the monoclinic C2/c polymorph of YP{sub 5}O{sub 14} has been refined from single-crystal X-ray diffraction data. The luminescence properties of the Eu{sup 3+} ion incorporated in this matrix as local structural probe show that the Eu{sup 3+} ions are distributed over the two Y{sup 3+} crystallographic sites of C{sub 2} symmetry of this structure.
- OSTI ID:
- 21212222
- Journal Information:
- Journal of Solid State Chemistry, Vol. 182, Issue 3; Other Information: DOI: 10.1016/j.jssc.2008.11.021; PII: S0022-4596(08)00602-6; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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