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Title: Investigation into the structure of ceramic Li{sub x}Na{sub 1-x}Ta{sub 0.1}Nb{sub 0.9}O{sub 3} solid solutions by X-ray analysis and Raman spectroscopy

The structure of ceramic solid solutions Li{sub x}Na{sub 1-x}Ta{sub 0.1}Nb{sub 0.9}O{sub 3} has been investigated by full-profile X-ray diffraction analysis and Raman spectroscopy. It is shown that their structure for all x values is similar to the NaNbO{sub 3} structure. The structure of NaTa{sub 0.1}Nb{sub 0.9}O{sub 3} solid solutions (x = 0) is characterized by the sp. gr. Pbcm, and the structure of Li{sub x}Na{sub 1-x}Ta{sub 0.1}Nb{sub 0.9}O{sub 3} solid solutions with x = 0.05, 0.1, and 0.16 is characterized by the sp. gr. P2{sub 1}ma. The unit-cell parameters decrease with an increase in x. At x = 0, doubled values of the parameter c and, correspondingly, the unit-cell volume are observed in the antiferroelectric phase. This fact is confirmed by the form of the vibrational spectrum in the region of stretching modes of oxygen atoms along the polar axis.
Authors:
; ; ; ;  [1] ; ;  [2]
  1. Russian Academy of Sciences, Tananaev Institute of Chemistry and Technology of Rare Earth Elements and Mineral Raw Materials, Kola Science Center (Russian Federation)
  2. Petrozavodsk State University (Russian Federation)
Publication Date:
OSTI Identifier:
22121696
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 58; Journal Issue: 4; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CERAMICS; LITHIUM COMPOUNDS; NIOBATES; ORTHORHOMBIC LATTICES; RAMAN SPECTROSCOPY; SODIUM COMPOUNDS; SOLID SOLUTIONS; SPECTRA; TANTALUM COMPOUNDS; X RADIATION; X-RAY DIFFRACTION