Crystal and defect structure of the mixed oxides LaMn1-zCuzO3 +/- y (0 <= z <= 0.4) / Petrov AN,Zuev AY,Tikchonova IL,Voronin VI // SOLID STATE IONICS. - 2000. - V. 129, l. 1-4. - P. 179-188.

ISSN/EISSN:

0167-2738 / нет данных

Type:

Article

Abstract:

The crystal structure and nonstoichiometry of the mixed Cu-doped lanthanum manganates LaMn1-zCuzO3+/-y (0 less than or equal to z less than or equal to 0.4) have been investigated by powder X-ray diffraction (PXD) and powder neutron diffraction (PND). The samples quenched in air from 1173 K to room temperature were crystallized in the orthorhombic structure (space group Pbnm). The oxygen positions, interatomic distances and occupancies have been refined based on the PXD and PND data. According to the refinement, mixed oxides LaMn1-zCuzO3+/-y with 0 less than or equal to z less than or equal to 0.2 exhibit full occupancies of the oxygen sites (O1 and O2) and deficiency of the La-sites. Oxygen nonstoichiometry in LaMn1-zCuzO3+/-y samples with values of z ranging from 0 to 0.3 were studied as a function of temperature (1150-1450 K) and oxygen partial pressure (10(-3.5)-1 atm) by means of thermogravimetry (TG). The absolute values of the oxygen nonstoichiometry (y) were determined by a full reduction in hydrogen and iodometric titration. A defect model describing experimental data is discussed. (C) 2000 Elsevier Science B.V. All rights reserved.

Author keywords:

copper-doped lanthanum manganate; crystal structure; oxygen nonstoichiometry; defect structure TRANSPORT-PROPERTIES; MAGNETIC-PROPERTIES; POWDER DIFFRACTION; PHASE-DIAGRAM; NONSTOICHIOMETRY; PEROVSKITES; LAMNO3; OXIDATION; STABILITY; BEHAVIOR

DOI:

10.1016/S0167-2738(99)00324-0

Web of Science ID:

ISI:000086349700014

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	APR
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	TRANSPORT-PROPERTIES; MAGNETIC-PROPERTIES; POWDER DIFFRACTION; PHASE-DIAGRAM; NONSTOICHIOMETRY; PEROVSKITES; LAMNO3; OXIDATION; STABILITY; BEHAVIOR
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Condensed Matter
ResearcherID-Numbers	Zuev, Andrey/E-6220-2014 Voronin, Vladimir/J-7733-2013
ORCID-Numbers	Voronin, Vladimir/0000-0002-3901-9812
Number-of-Cited-References	23
Usage-Count-Since-2013	9
Journal-ISO	Solid State Ion.
Doc-Delivery-Number	302DG