Large angle convergent beam electron diffraction determinations of dislocation Burgers vectors in synthetic stishovite

P. Cordier, Thomas Sharp

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15 Scopus citations


Polycrystalline stishovite, synthesized in a multi-anvil apparatus at 15 GPa and 1200°C, contains numerous dislocations. The microstructures of the recovered material have been investigated using Transmission Electron Microscopy (TEM). The Burgers vectors of the dislocations were determined using Large Angle Convergent Beam Electron Diffraction (LACBED). We find that <100>, <001>, <110> and <101> dislocations were activated in the stishovite during the synthesis experiments. Dislocation microstructures, indicative of dislocation glide, suggest that plastic deformation occurred during quench. Subgrain boundaries that are present in some grains indicate that some recovery occurred. As recovery is unlikely during quench, deformation also occurred during synthesis.

Original languageEnglish (US)
Pages (from-to)548-555
Number of pages8
JournalPhysics and Chemistry of Minerals
Issue number8
StatePublished - Dec 1 1998


ASJC Scopus subject areas

  • Materials Science(all)
  • Geochemistry and Petrology

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