Crystal structure and physicochemical properties of layered perovskite-like phases LnBaCo2O5 + δ / Aksenova T.V., Gavrilova L.Ya., TsvetkoV D.S., Voronin V.I., CherepanoV V.A. // Russian Journal of Physical Chemistry A. - 2011. - V. 85, l. 3. - P. 427-432.

ISSN:

00360244

Type:

Article

Abstract:

Complex oxides LnBaCo2O5 + δ (Ln = Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y) were obtained by solid-state synthesis at 1373 K in air. The crystal structure of layered perovskites LnBaCo2O 5 + δ was studied by X-ray and neutron diffraction analyses. It was shown that cobaltites LnBaCo2O5 + δ crystallized in tetragonal (space group P4/mmm, 0.6 > δ > 0.45) or orthorhombic (space group Pmmm, 0.6 > δ > 0.45) structures depending on the radius of the lanthanide ion and the oxygen content. The dependences of the unit cell parameters of LnBaCo2O5 + δ on the radius of the lanthanide ion were obtained. The average thermal expansion coefficients at temperatures from 298 to 1373 K in air were determined. The dependence of the chemical component of thermal expansion on the oxygen content was evaluated for LnBaCo2O5 + δ (Ln = Nd, Sm, Gd, Y). © 2011 Pleiades Publishing, Ltd.

Author keywords:

Crystal structure; Layered perovskite-like phases; X-ray and neutron diffraction analyses

Index keywords:

Chemical component; Complex oxides; Lanthanide ion; Layered perovskite; Layered perovskite-like phases; Oxygen content; Physicochemical property; Solid-state synthesis; Space Groups; Thermal expansion

DOI:

10.1134/S0036024411030022

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https://www.scopus.com/inward/record.uri?eid=2-s2.0-79955923497&doi=10.1134%2fS0036024411030022&partnerID=40&md5=04a03a6e12b5b1c131dc4093d78cdfdb

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-79955923497&doi=10.1134%2fS0036024411030022&partnerID=40&md5=04a03a6e12b5b1c131dc4093d78cdfdb
Affiliations	Gorkii Ural State University, Yekaterinburg, Russian Federation; Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russian Federation
Author Keywords	Crystal structure; Layered perovskite-like phases; X-ray and neutron diffraction analyses
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Correspondence Address	Aksenova, T. V.; Gorkii Ural State University, Yekaterinburg, Russian Federation; email: aksenovatanya@yandex.ru
Language of Original Document	English
Abbreviated Source Title	Russ. J. Phys. Chem. A
Source	Scopus