Physics and Chemistry of Minerals

, Volume 25, Issue 8, pp 548–555 | Cite as

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

  • P. Cordier
  • T. G. Sharp
ORIGINAL PAPER

Abstract 

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.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • P. Cordier
    • 1
  • T. G. Sharp
    • 2
  1. 1.Laboratoire de Structure et Propriétés de l’Etat Solide – URA CNRS 234, Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq, Cedex – France Phone: +33 03 20 43 43 41, Fax: +33 03 20 43 65 91, e-mail: Patrick.Cordier@univ-lille1.frFR
  2. 2.Bayerishes Geoinstitut Universität Bayreuth, D-95440 Bayreuth – GermanyDE

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