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Dislocation core structures in a quartz derived from α valence force potential

Heggie, M and Nylén, M (1984) Dislocation core structures in a quartz derived from α valence force potential Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties, 50 (5). pp. 543-555.

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Abstract

The minimum core energies of inequivalent perfect dislocations in α quartz with Burgers vector a1, a2or c and line direction a2or c are evaluated using a Keating-type valence force potential fitted to phonon dispersion curves. Dislocations that are dissociated or contain dangling bonds, valence alternation defects or non-stoichiometry are not considered. The low values of the core energies for the lowest-energy structure of each dislocation type, generally in the range 2·5 pV, appear to justify the last three restrictions, with the possible exception of c screw dislocations which should have core energies not lower than 6 eV. © 1984 Taylor & Francis Group, LLC.

Item Type: Article
Authors :
NameEmailORCID
Heggie, Mm.heggie@surrey.ac.ukUNSPECIFIED
Nylén, MUNSPECIFIEDUNSPECIFIED
Date : 1 January 1984
Identification Number : https://doi.org/10.1080/13642818408238877
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:43
Last Modified : 17 May 2017 12:43
URI: http://epubs.surrey.ac.uk/id/eprint/836485

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