Published September 2005
| Version v1
Journal article
Extension of the La7Mo7O30 structural type with La7Nb3W4O30 and La7Ta3W4O30 compounds
Creators
- 1. Laboratoire des Oxydes et Fluorures, UMR-CNRS 6010, Universite du Maine, 72085 Le Mans cedex 9 (France)
- 2. Institut Laue Langevin, Avenue des Martyrs, B.P 156, 38042 Grenoble Cedex 9 (France)
Description
Two compounds of formula La7A3W4O30 (with A=Nb and Ta) were prepared by solid-state reaction at 1450 and 1490oC. They crystallize in the rhombohedric space group R-3 (No. 148), with the hexagonal parameters: a=17.0640(2)A, c=6.8859(1)A and a=17.0701(2)A, c=6.8851(1)A. The structure of the materials was analyzed from X-ray, neutron and electronic diffraction. These oxides are isostructural of the reduced molybdenum compound La7Mo7O30, which are formed of perovskite rod along [111]. An order between (Nb, Ta) and W is observed
Additional details
Identifiers
- DOI
- 10.1016/j.jssc.2005.06.020;
- PII
- S0022-4596(05)00285-9;
Publishing Information
- Journal Title
- Journal of Solid State Chemistry
- Journal Volume
- 178
- Journal Issue
- 9
- Journal Page Range
- p. 2811-2817
- ISSN
- 0022-4596
- CODEN
- JSSCBI
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37040332
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- ELECTRON DIFFRACTION; ELECTRON MICROSCOPY; LANTHANUM COMPOUNDS; MOLYBDENUM COMPOUNDS; NEUTRON DIFFRACTION; OXIDES; PEROVSKITE; SPACE GROUPS; TANTALUM COMPOUNDS; TUNGSTEN COMPOUNDS; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; MICROSCOPY; MINERALS; OXIDE MINERALS; OXYGEN COMPOUNDS; PEROVSKITES; RARE EARTH COMPOUNDS; REFRACTORY METAL COMPOUNDS; SCATTERING; SYMMETRY GROUPS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.