The defect chemistry of LaMnO[sub 3 [+-][delta]]. 2. Structural aspects of LaMnO[sub 3+[delta]]

Journal Article · Sun May 01 00:00:00 EDT 1994 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1006/jssc.1994.1141· OSTI ID:6923840

Van Roosmalen, J A.M.; Cordfunke, E H.P.; Helmholdt, R B ^[1]; Zandbergen, H W ^[2]

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1. Netherlands Energy Research Foundation ECN, Petten (Netherlands)
2. Delft Univ. of Technology (Netherlands)

The overall defects in LaMnO[sub 3+[delta]] have been studied by powder neutron diffraction, electron diffraction, and high resolution transmission electron microscopy on a sample with the formal composition LaMnO[sub 3.158]. Neutron diffraction, in combination with chemical analysis, indicates that the actual composition is La[sub 0.95]Mn[sub 0.95]O[sub 3]. The electron microscopy results indicate that no defect clustering or crystallographic shear occurs. It is concluded that the defect chemistry of LaMnO[sub 3+[delta]] must be described with randomly distributed La and Mn vacancies in equal amounts.

• OSTI ID: 6923840
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 110:1; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MANGANESE COMPOUNDS
MANGANESE OXIDES
MICROSCOPY
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SCATTERING
STOICHIOMETRY
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY