Influence of Oxygen Nonstoichiometry on the Spectral Properties of Solid Solutions LaNb2-2xTa2xVO9-d (x= 0--0.4) and LaTa2-2xNb2xVO9-d (x= 0--0.1) Full article
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Journal of Solid State Chemistry
ISSN: 0022-4596 , E-ISSN: 1095-726X |
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Output data | Year: 2002, Volume: 167, Number: 1, Pages: 73-79 Pages count : 7 DOI: 10.1006/jssc.2002.9621 | ||||
Tags | EPR, NMR, IR, Oxygen nonstoichiometry, Raman spectra, Solid solutions | ||||
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Abstract:
Phase equilibria in the LaVO4–Nb2O5–Ta2O5 system were analyzed. New solid solutions LaTa2−2xNb2xVO9−δ (x=0–0.1) and LaNb2−2xTa2xVO9−δ (x=0–0.4) were detected in this system. The structures of the vanadate–niobate LaNb2VO9 and vanadate–tantalate LaTa2VO9 are not known. The structures of the vanadate–tantalate LaTa2VO9 and LaTa2VO9-based solid solutions are similar to the structure of LaTa7O19, which refers to the hexagonal crystal system. The influence of the oxygen nonstoichiometry δ(x) on crystallochemical characteristics and spectral properties of these solid solutions were examined by the X-ray phase analysis, IR and radio spectroscopic methods. A correlation between the nonstoichiometry δ(x) and the volume of a unit cell V(x) of solid solutions LaTa2−2xNb2xVO9−δ was found. The IR spectrum of LaTa2VO9−δ transformed in going from δ=0 to δ≠0. Two types of VO4 tetrahedra were formed in solid solutions LaNb2−2xTa2xVO9−δ depending on δ(x).
Cite:
Zuev M.G.
, Arkhipova E.V.
, Perelyaeva L.A.
, Zolotukhina L.V.
, Lapina O.B.
, Pletnev R.N.
Influence of Oxygen Nonstoichiometry on the Spectral Properties of Solid Solutions LaNb2-2xTa2xVO9-d (x= 0--0.4) and LaTa2-2xNb2xVO9-d (x= 0--0.1)
Journal of Solid State Chemistry. 2002. V.167. N1. P.73-79. DOI: 10.1006/jssc.2002.9621 WOS Scopus РИНЦ
Influence of Oxygen Nonstoichiometry on the Spectral Properties of Solid Solutions LaNb2-2xTa2xVO9-d (x= 0--0.4) and LaTa2-2xNb2xVO9-d (x= 0--0.1)
Journal of Solid State Chemistry. 2002. V.167. N1. P.73-79. DOI: 10.1006/jssc.2002.9621 WOS Scopus РИНЦ
Dates:
Submitted: | Dec 6, 2001 |
Accepted: | Apr 19, 2002 |
Published print: | Aug 1, 2002 |
Published online: | Oct 1, 2002 |
Identifiers:
Web of science | WOS:000177915800009 |
Scopus | 2-s2.0-0036672602 |
Elibrary | 13395902 |
Chemical Abstracts | 2002:738310 |
Chemical Abstracts (print) | 137:342538 |
OpenAlex | W2087418994 |