A structural consideration of the defect in LaMnO3 phase around stoichiometric composition

The defect structure of LaMnO3 phase close to its stoichiometric composition was studied by TEM. The electron diffraction patterns of this phase showed two series of superlattice spots that are forbidden for Pnma(62), the reported symmetry for stoichiometric LaMnO3. 00l (l = odd) such as 001 and hk0...

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Bibliographic Details
Published in:Ceramics international 2005, Vol.31 (2), p.257-259
Main Authors: UENO, Shunkichi, SHIMONO, Akira, NAKANO, Hiromi, KAMEGASHIRA, Naoki
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Condensed matter: structure, mechanical and thermal properties
Electrotechnical and electronic ceramics
Exact sciences and technology
Inorganic compounds
Physics
Salts
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Technical ceramics
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Summary:The defect structure of LaMnO3 phase close to its stoichiometric composition was studied by TEM. The electron diffraction patterns of this phase showed two series of superlattice spots that are forbidden for Pnma(62), the reported symmetry for stoichiometric LaMnO3. 00l (l = odd) such as 001 and hk0 (h = odd) such as 100 superlattice spots appeared in [110] and [011] zone patterns. The low magnification TEM images in [110] zone showed coherent twins. The twin plane was (112). 13 refs.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2004.05.010