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Solving Unknown Complex Oxide Structures by Precession Electron Diffraction: AgCoO2, PbMnO2.75 and LiTi1.5Ni0.5O4

Published online by Cambridge University Press:  31 January 2011

Holger Klein
Affiliation:
[email protected], Institut Néel, MCMF, Grenoble, France
Mauro Gemmi
Affiliation:
[email protected], Università degli Studi di Milano, Dipartimento di Scienze della Terra "A. Desio", Milano, Italy
Amélie Rageau
Affiliation:
[email protected], Institut Néel, MCMF, Grenoble, France
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Abstract

Oxides synthesized in high temperature / high pressure conditions often show complex structures and contain several phases which makes a structure solution by X-ray crystallography very difficult or even impossible. Electron crystallography can then be a powerful alternative. We show here the structure solution of 3 oxides by precession electron diffraction. The phases include a simple hexagonal structure (AgCoO2), a complex monoclinic structure (PbMnO2.75) with a quasi 2-dimensional unit cell and a complex trigonal structure (LiTi1.5Ni0.5O4). In the last case even the positions for the light element Li were determined.

Type
Research Article
Copyright
Copyright © Materials Research Society 2009

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