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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
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.
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