Phase equilibria and crystal structure of complex oxides in the La-Sr-Co-Ni-O system / Gavrilova LY,Aksenova TV,Bannykh LA,Teslenko YV,Cherepanov VA // JOURNAL OF STRUCTURAL CHEMISTRY. - 2003. - V. 44, l. 2. - P. 248-251.

ISSN/EISSN:

0022-4766 / нет данных

Type:

Article

Abstract:

Phase equilibria in the La-Sr-Co-Ni-O system were studied in air at 1100degreesC. The samples for the study were synthesized by the standard ceramic and citrate processes. The limiting solubility and structure of La1-xSrxCo1-yNiyO3-delta and (La1-xSrx)(2)Co1-yNiyO4 solid solutions were determined by X-ray powder diffraction analysis. La1-xSrxCo1-yNiyO3-delta solid solutions with 0 less than or equal to x less than or equal to 0.5 have a distorted rhombohedral perovskite-like structure (R (3) over barc space group). An increase in the strontium concentration reduces the rhombohedral distortions, and the compounds with x > 0.5 have an ideal cubic structure (Pm3m space group). (La1-xSrx)(2)Co1-yNiyO4 crystals have a tetragonal K2NiF4 type unit cell (14/mmm space group). The relationships between unit cell parameters and compositions were obtained for single-phase La1-xSrxCo1-yNiyO3-delta and (La1-xSrx)(2)Co1-yNiyO4 samples. The existence regions of La1-xSrxCo1-yNiyO3-delta and (La1-xSrx)(2)Co1-yNiyO4 solid solutions were distinguished on P-T phase diagrams.

Author keywords:

phase equilibria; phase diagram; crystal structure; complex oxides; lanthanum; strontium; cobalt; nickel

DOI:

10.1023/A:1025502909188

Web of Science ID:

ISI:000185150500014

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR-APR
Publisher	CONSULTANTS BUREAU
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Chemistry, Physical
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Number-of-Cited-References	7
Usage-Count-Since-2013	5
Journal-ISO	J. Struct. Chem.
Doc-Delivery-Number	718ML