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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 ,
Mauro Gemmi  and
Amélie Rageau
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.

Keywords

crystallographic structuretransmission electron microscopy (TEM)oxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1184: Symposium GG – Electron Crystallography for Materials Research and Quantitive Characterization of Nanostructured Materials , 2009 , 1184-GG01-06
Copyright
Copyright © Materials Research Society 2009

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