Crystal structure and spectroscopic properties of a new oxyarsenate Li0.5Ni0.25TiOAsO4
- 1. Laboratoire de Chimie des Materiaux Solides, Universite Hassan II, Mohammedia Faculte des Sciences Ben M'Sik, Casablanca (Morocco)
- 2. Institut de Chimie de la Matiere Condensee de Bordeaux (ICMCB-CNRS - UPR 9048), Universite Bordeaux 1, 87 Avenue du Dr. A. Schweitzer, 33608 Pessac Cedex (France)
- 3. Laboratoire Leon Brillouin (CEA-CNRS), CEA/Saclay, 91191 Gif-sur-Yvette Cedex (France)
- 4. Department of Chemistry, University of Pretoria, 0002 Pretoria (South Africa)
Description
The new oxyarsenate Li0.5Ni0.25TiOAsO4 has been synthesized and studied by a combination of X-ray powder diffraction, neutrons powder diffraction and vibrational spectroscopy. Li0.5Ni0.25TiOAsO4 crystallizes in the monoclinic P21/c space group with the unit cell parameters: a = 6.5854(3) A, b = 7.4665(4) A, c = 7.4969(4) A, β = 89.884(6)o, V = 368.62(1) A3 and Z = 4. The structure has been determined at room temperature from neutrons diffraction by the Rietveld method analysis. It is formed by a 3D network of TiO6 octahedra and AsO4 tetrahedra sharing corners. Structural refinement shows a partial and a statistical occupancy of 2a and 2b sites by Li+ and Ni2+ ions. TiO6 octahedra are linked together by corners and form infinite chains along c-axis. Raman and infrared studies confirm the existence of -Ti-O-Ti- chains. Diffuse reflectance spectrum indicates the presence of octahedrally coordinated Ni2+ ions
Additional details
Identifiers
- DOI
- 10.1016/j.materresbull.2006.10.011;
- PII
- S0025-5408(06)00396-5;
Publishing Information
- Journal Title
- Materials Research Bulletin
- Journal Volume
- 42
- Journal Issue
- 7
- Journal Page Range
- p. 1348-1356
- ISSN
- 0025-5408
- CODEN
- MRBUAC
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39025432
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ARSENATES; LITHIUM IONS; MONOCLINIC LATTICES; NEUTRON DIFFRACTION; NICKEL IONS; OPTICAL PROPERTIES; RAMAN SPECTROSCOPY; SPACE GROUPS; X-RAY DIFFRACTION
- Descriptors DEC
- ARSENIC COMPOUNDS; CHARGED PARTICLES; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; IONS; LASER SPECTROSCOPY; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; SPECTROSCOPY; SYMMETRY GROUPS
Optional Information
- Copyright
- Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.