Preparation and Investigation of Compounds with the 114-Type Structure in the Y-Sc-Ba-Co-O System | Sciact - CRIS-system of Boreskov Institute of Catalysis

Preparation and Investigation of Compounds with the 114-Type Structure in the Y-Sc-Ba-Co-O System Full article

Journal

Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779

Output data

Year: 2020, Volume: 61, Number: 1, Pages: 29-43 Pages count : 15 DOI: 10.1134/S0022476620010047

Tags

cationic substitutions; ceramics; cobaltates; crystal structure; phase formation; Sc; single crystals

Authors

Kameneva M.Y. ¹ , Kozeeva L.P. ¹ , Lavrov A.N. ¹ , Komarov V.Yu. ^1,2 , Podberezskaya N.V. ¹ , Kuchumov B.M. ¹ , Rudina N.A. ³

Affiliations

1	Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
2	Novosibirsk State University, Novosibirsk, Russian Federation
3	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation

The processes of phase formation in the Y-Ba-Co-O system doped with scandium are studied in the region of compositions 1:1:4:7. The mechanism of interaction of initial reagents changes with scandium concentration: at low scandium contents, the (Y1−yScy)BaCo4O7+x (R114) doped oxide is formed, similarly to the undoped system, through the YBaCo2O5+x (R112) phase; at significantly higher scandium contents (≥0.2), the role of the intermediate and the competing phase is played by BaCo1−yScyO3−x representing a number of solid solutions which are stable in wide ranges of temperatures and scandium contents. It is shown that scandium in the R114 structure preferably occupies the yttrium position (Y1−yScyBaCo4O7+x), and the maximum degree of substitution is ymax ≈ 0.3–0.35. When yttrium is substituted with a smaller (in terms of ionic radii) scandium atom, the size of the unit cell diminishes nearly isotropically, the maximum change of its volume being 2.0% (from 353.0 Å3 to 345.9 Å3). © 2020, Pleiades Publishing, Ltd.

Kameneva M.Y. , Kozeeva L.P. , Lavrov A.N. , Komarov V.Y. , Podberezskaya N.V. , Kuchumov B.M. , Rudina N.A.
Preparation and Investigation of Compounds with the 114-Type Structure in the Y-Sc-Ba-Co-O System
Journal of Structural Chemistry. 2020. V.61. N1. P.29-43. DOI: 10.1134/S0022476620010047 WOS Scopus РИНЦ AN OpenAlex

Каменева М.Ю. , Козеева Л.П. , Лавров А.Н. , Комаров В.Ю. , Подберезская Н.В. , Кучумов Б.М. , Рудина Н.А.
Получение и исследование соединений с типом структуры 114 в системе Y—Sc—Ba—Co—O
Журнал структурной химии. 2020. Т.61. №1. С.33–47. DOI: 10.26902/jsc_id49667RSCI РИНЦ OpenAlex

Submitted:	May 30, 2019
Accepted:	Sep 2, 2019
Published print:	Jan 1, 2020
Published online:	Jul 14, 2020

Web of science:	WOS:000548452300004
Scopus:	2-s2.0-85087986519
Elibrary:	45416041
Chemical Abstracts:	2020:1391745
OpenAlex:	W3042589084

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