Synthesis and structure of new framework phosphates Li{sub 1/4M7/4}(PO{sub 4}){sub 3}(M = Nb, Ta)
- Moscow State University (Russian Federation)
- Lobachevski Nizhni Novgorod State University (Russian Federation)
New lithium-niobium and lithium-tantalum phosphates Li{sub 1/4}M{sub 7/4}(PO{sub 4}){sub 3}(M = Nb, Ta) are synthesized by the solid-phase method. The compounds prepared are characterized using electron microprobe analysis, X-ray powder diffraction, and IR spectroscopy. The crystal structure of the Li{sub 1/4}Ta{sub 7/4}(PO{sub 4}){sub 3} phosphate is determined from the X-ray powder diffraction data (the Rietveld method) and belongs to the framework type. The framework of the structure consists of TaO{sub 6} and LiO{sub 6} vertex-shared octahedra and PO{sub 4} tetrahedra. The isostructural phosphates Li{sub 1/4}M{sub 7/4}(PO{sub 4}){sub 3} crystallize in the trigonal crystal system (space group R3-barc, Z = 6) and belong to the NaZr{sub 2}(PO{sub 4}){sub 3} structure type.
- OSTI ID:
- 22050896
- Journal Information:
- Crystallography Reports, Vol. 53, Issue 6; Other Information: Copyright (c) 2008 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
- Country of Publication:
- United States
- Language:
- English
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