Comparative Analysis of Long- and Short-Range Structures Features in Titanates Ln2Ti2O7 and Zirconates Ln2Zr2O7 (Ln = Gd, Tb, Dy) upon the Crystallization Process Full article
Journal |
Journal of Physics and Chemistry of Solids
ISSN: 0022-3697 |
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Output data | Year: 2019, Volume: 130, Pages: 144-153 Pages count : 10 DOI: 10.1016/j.jpcs.2019.02.019 | ||||||||||||||||
Tags | oxides Phase transitions X-ray diffraction XAFS (EXAFS and XANES) Raman spectroscopy | ||||||||||||||||
Authors |
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Affiliations |
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Funding (4)
1 | Russian Science Foundation | 18-12-00133 |
2 | Spanish National Research Council | 2010-6-OE-013 |
3 | Ministry of Economic Affairs and Digital Transformation | |
4 | Ministry of Science and Higher Education of the Russian Federation | 0239-2019-0003 |
Abstract:
We report a comparative study of Ln2M2O7 (Ln = Gd, Tb, Dy; M = Ti, Zr) synthesized by combination of the sol-gel and coprecipitation methods followed by calcination at elevated temperatures. The long-range average crystal as well as short-range local structure in the samples were analyzed using X-ray diffraction, X-ray absorption spectroscopy (XAFS) and Raman spectroscopy. It has been found that Ln-Ti precursors crystallize directly to pyrochlore phase, whereas crystallization of Ln-Zr precursors to pyrochlore phase goes through intermediate fluorite phase. We have shown that X-ray absorption data make possible to detect the crystallization and phase transition features in Ln2M2O7 such as splitting of Ln-O coordination shells and changes of the symmetry in local environment.
Cite:
Popov V.V.
, Menushenkov A.P.
, Ivanov A.A.
, Gaynanov B.R.
, Yastrebtsev A.A.
, d’Acapito F.
, Puri A.
, Castro G.R.
, Shchetinin I.V.
, Zheleznyi M.V.
, Zubavichus Y.V.
, Ponkratov K.V.
Comparative Analysis of Long- and Short-Range Structures Features in Titanates Ln2Ti2O7 and Zirconates Ln2Zr2O7 (Ln = Gd, Tb, Dy) upon the Crystallization Process
Journal of Physics and Chemistry of Solids. 2019. V.130. P.144-153. DOI: 10.1016/j.jpcs.2019.02.019 WOS Scopus РИНЦ
Comparative Analysis of Long- and Short-Range Structures Features in Titanates Ln2Ti2O7 and Zirconates Ln2Zr2O7 (Ln = Gd, Tb, Dy) upon the Crystallization Process
Journal of Physics and Chemistry of Solids. 2019. V.130. P.144-153. DOI: 10.1016/j.jpcs.2019.02.019 WOS Scopus РИНЦ
Dates:
Submitted: | Jul 31, 2018 |
Accepted: | Feb 17, 2019 |
Published online: | Feb 22, 2019 |
Published print: | Jul 1, 2019 |
Identifiers:
Web of science | WOS:000467669100018 |
Scopus | 2-s2.0-85062291700 |
Elibrary | 38701935 |
Chemical Abstracts | 2019:413468 |
OpenAlex | W2915709741 |