Phase equilibria in the LaCoO3-LaMnO3-BaCoOz-BaMnO3 system / Cherepanov VA,Filonova EA,Voronin VI,Berger IF // JOURNAL OF SOLID STATE CHEMISTRY. - 2000. - V. 153, l. 2. - P. 205-211.

ISSN/EISSN:

0022-4596 / нет данных

Type:

Article

Abstract:

The phase equilibria in the LaCoO3-LaMnO3-BaCoOz-BaMnO3 system were studied at 1100 degrees C in air by powder X-ray diffractometry of quenched samples. The existence of three phases in the BaCo1-yMnyO3-delta system was confirmed. Two of these phases are homogeneous in the range 0.15 less than or equal to y less than or equal to 0.30 and 0.38 less than or equal to y less than or equal to 0,55, Both have hexagonal structures (space group P6(3)/mmc), but 10-layered and 12-layered cells, respectively, The last phase, with approximate composition BaCo0.285Mn0.715O3-delta, was indexed on the basis of a 21H-structure with the unit cell parameters a = 5,7676(8) and c = 49.58(1) Angstrom (space group P6(3)/mmc), It was found that La1-xBaxMnO3+/-delta phases with 0 less than or equal to x less than or equal to 0.10 possess O-orthorhombic structures (space group Pnma) and samples with 0.125 less than or equal to x less than or equal to 0.30 have rhombohedral structures (space group R (3) over bar c). The homogeneity range of solid solutions of the general formula La1-xBaxCo1-yMnyO3+/-delta with orthorhombic, rhombohedral, and cubic structures has been determined, On the basis of the experimental results and earlier data, the pseudoquaternary phase diagram at 1100 degrees C in air was constructed. (C) 2000 Academic Press.

Author keywords:

CRYSTAL-STRUCTURE; O SYSTEM

DOI:

10.1006/jssc.2000.8743

Web of Science ID:

ISI:000089082800002

Соавторы в МНС:

Другие поля

Поле	Значение
Month	SEP
Publisher	ACADEMIC PRESS INC
Address	525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
Language	English
Keywords-Plus	CRYSTAL-STRUCTURE; O SYSTEM
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Chemistry, Physical
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014 Voronin, Vladimir/J-7733-2013
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459 Voronin, Vladimir/0000-0002-3901-9812
Number-of-Cited-References	33
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	5
Journal-ISO	J. Solid State Chem.
Doc-Delivery-Number	350CH