On the space group of aluminium oxynitride spinel

Vinayak P. Dravid, John A. Sutliff, Alistair D. Westwood, M. R. Notis, C. E. Lyman

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


In view of the controversy surrounding the crystal symmetry of spinels, an aluminium oxynitride phase reported to be based on the spinel structure has been investigated using convergent beam electron diffraction (CBED) and computer simulation. A variety of CBED point and space group determination methods have been utilized in search of possible non-centrosymmetry which reduces the space group symmetry from Fd3m to F43m. The occurrence of Gjønnes-Moodie (GM) lines in the debated {2 0 0} reflections is also explored through careful voltage variation experiments. The detailed analyses clearly show that the point group of this spinel is the centrosymmetric m3m and that the space group is Fd3m.

Original languageEnglish (US)
Pages (from-to)417-434
Number of pages18
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Issue number3
StatePublished - Mar 1990

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys

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