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Title: Investigation of the La{sub 2}O{sub 3}–Nb{sub 2}O{sub 5}–WO{sub 3} ternary phase diagram: Isolation and crystal structure determination of the original La{sub 3}NbWO{sub 10} material

In the course of the exploration of the La{sub 2}O{sub 3}–WO{sub 3}–Nb{sub 2}O{sub 5} ternary phase diagram, a new compound with the formula La{sub 3}NbWO{sub 10} was discovered. Its structure was determined from a combination of powder X-ray and neutron diffraction data. It crystallizes in the tetragonal space group P4{sub 2}/nmc (no. 137) with the lattice parameters: a=10.0807(1) Å; c=12.5540(1) Å. The structure is built up from infinite ribbons of octahedra (W/Nb)O{sub 5} which are perpendicular to each other, lanthanum ions being distributed around these ribbons. The electrical properties of this compound were investigated on sintered pellets by means of complex impedance spectroscopy. - Graphical abstract: Projection along the c-axis of cationic and anionic positions of a La{sub 3}NbWO{sub 10} unit cell. - Highlights: • The structure of La{sub 3}NbWO{sub 10} was resolved from the XRD and ND data. • The structure was described in many ways. • The ionic conduction property was studied.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [1]
  1. IMMM (Institute of Materials and Molecules of Mans), UMR-CNRS 6283, University of Maine, 72085 Le Mans Cedex 9 (France)
  2. KAUST (King Abdullah University of Science and Technology), Thuwal (Saudi Arabia)
  3. ILL - Institute Lauë-Langevin, 6 J. Horowitz street, B P 156, 38042 Grenoble Cedex 9 (France)
Publication Date:
OSTI Identifier:
22486758
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 229; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ELECTRICAL PROPERTIES; IMPEDANCE; LANTHANUM IONS; LANTHANUM OXIDES; LATTICE PARAMETERS; NEUTRON DIFFRACTION; NIOBIUM OXIDES; PHASE DIAGRAMS; POWDERS; SPECTROSCOPY; TETRAGONAL LATTICES; TUNGSTATES; TUNGSTEN OXIDES; X-RAY DIFFRACTION