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Titolo:
NEUTRON AND X-RAY-POWDER DIFFRACTION STUDIES OF LANTHANUM MANGANITE, A NONSTOICHIOMETRIC PEROVSKITE
Autore:
HABEKOST S; NORBY P; JORGENSEN JE; LEBECH B;
Indirizzi:
ODENSE UNIV,DEPT CHEM DK-5230 ODENSE DENMARK ODENSE UNIV,DEPT CHEM DK-5230 ODENSE DENMARK AARHUS UNIV,DEPT INORGAN CHEM DK-8000 AARHUS DENMARK RISO NATL LAB,DEPT SOLID STATE PHYS DK-4000 ROSKILDE DENMARK
Titolo Testata:
Acta chemica Scandinavica
fascicolo: 5, volume: 48, anno: 1994,
pagine: 377 - 381
SICI:
0904-213X(1994)48:5<377:NAXDSO>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXIDATION-REDUCTION BEHAVIOR; SR-DOPED LAMNO3; DEFECT STRUCTURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
S. Habekost et al., "NEUTRON AND X-RAY-POWDER DIFFRACTION STUDIES OF LANTHANUM MANGANITE, A NONSTOICHIOMETRIC PEROVSKITE", Acta chemica Scandinavica, 48(5), 1994, pp. 377-381

Abstract

The defect structure of a hexagonal perovskite-type lanthanum manganite was studied using Rietveld refinement of powder diffraction data. The nominal composition of the sample was La0.85Mn1.00O3+/-delta. The structure was refined using simultaneous refinement of two sets of neutron diffraction data and one set of X-ray diffraction data in order tocombine the advantages of using different types of radiation and different wavelengths. A precise determination of the occupancies of La and Mn is difficult owing to a very strong correlation between occupancies and temperature factors. These difficulties are discussed based on a series of models using various constraints on the temperature factors. It is concluded that the manganese and oxygen sublattice in the lanthanum manganite is fully occupied, whereas vacancies are present in the lanthanum sublattice.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 12:50:11