TY - JOUR
T1 - Large angle convergent beam electron diffraction determinations of dislocation Burgers vectors in synthetic stishovite
AU - Cordier, P.
AU - Sharp, Thomas
PY - 1998/12/1
Y1 - 1998/12/1
N2 - 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.
AB - 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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U2 - 10.1007/s002690050147
DO - 10.1007/s002690050147
M3 - Article
AN - SCOPUS:0032460240
SN - 0342-1791
VL - 25
SP - 548
EP - 555
JO - Physics and Chemistry of Minerals
JF - Physics and Chemistry of Minerals
IS - 8
ER -