Crystal structure and spectroscopic properties of a new oxyarsenate Li0.5Ni0.25TiOAsO4
| Autor: | M. Chakir, Jean-Pierre Chaminade, Françoise Bourée, D. de Waal, A. El Jazouli |
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| Přispěvatelé: | Laboratoire de Chimie des Matériaux Solides, Faculté des Sciences Ben M'sik [Casablanca], Université Hassan II [Casablanca] (UH2MC)-Université Hassan II [Casablanca] (UH2MC), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Department of Chemistry, University of Pretoria [South Africa], Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Neutron diffraction Inorganic compounds Infrared spectroscopy 02 engineering and technology Crystal structure 010402 general chemistry 01 natural sciences General Materials Science Optical properties Mechanical Engineering Space group [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences 3. Good health Crystallography Octahedron Mechanics of Materials Raman spectroscopy X-ray crystallography 0210 nano-technology Powder diffraction Monoclinic crystal system |
| Zdroj: | Materials Research Bulletin Materials Research Bulletin, Elsevier, 2007, 42 (7), pp.1348-1356. ⟨10.1016/j.materresbull.2006.10.011⟩ Materials Research Bulletin, 2007, 42 (7), pp.1348-1356. ⟨10.1016/j.materresbull.2006.10.011⟩ |
| ISSN: | 0025-5408 1873-4227 |
| DOI: | 10.1016/j.materresbull.2006.10.011 |
| Popis: | The new oxyarsenate Li{sub 0.5}Ni{sub 0.25}TiOAsO{sub 4} has been synthesized and studied by a combination of X-ray powder diffraction, neutrons powder diffraction and vibrational spectroscopy. Li{sub 0.5}Ni{sub 0.25}TiOAsO{sub 4} crystallizes in the monoclinic P2{sub 1}/c space group with the unit cell parameters: a = 6.5854(3) A, b = 7.4665(4) A, c = 7.4969(4) A, {beta} = 89.884(6){sup o}, V = 368.62(1) A{sup 3} 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 TiO{sub 6} octahedra and AsO{sub 4} tetrahedra sharing corners. Structural refinement shows a partial and a statistical occupancy of 2a and 2b sites by Li{sup +} and Ni{sup 2+} ions. TiO{sub 6} 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 Ni{sup 2+} ions. |
| Databáze: | OpenAIRE |
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