The defect structures of Mn1-xO

M. J. Radler, J. B. Cohen, G. P. Sykora, Thomas O Mason, D. E. Ellis, John Faber

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

In situ neutron powder diffraction patterns analyzed by the Rietveld technique show no interstitial occupation for 0 <x <0.05 at 1673 K. At a larger deviation from stoichiometry, x = 0.09, an interstitial occupation of 2(1) pct. has been measured, similar to that observed for Fe1-xO at 1323 K. The vacancy interstitial ratio of 5.5 is indicative of a mixture of small cation vacancy clusters and unassociated cation vacancies. New theoretical results indicate that the oxygen shell around a defect cluster expands to help stablize the cluster. In situ X-ray single crystal diffraction studies of Mn1-xO (01-xO. By comparison with the absolute intensities from diffuse scattering in Fe1-xO it is evident that even a small degree of cluster ordering should have been visible, even at 1573K. This information is employed to model new measurements of conductivity at large deviations from stoichiometry.

Original languageEnglish
Pages (from-to)141-154
Number of pages14
JournalJournal of Physics and Chemistry of Solids
Volume53
Issue number1
DOIs
Publication statusPublished - 1992

Keywords

  • defect clusters in oxides
  • defects in oxides
  • electrical conductivity in oxides
  • manganosite
  • Manganous oxide
  • oxides
  • transition metal oxides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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