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THEORY OF DIFFUSION OF HEAVY IMPURITIES IN ALKALI-METALS

SCHOBER, H; TAYLOR, R; NORGETT, MJ; STONEHAM, AM; (1975) THEORY OF DIFFUSION OF HEAVY IMPURITIES IN ALKALI-METALS. J PHYS F MET PHYS , 5 (4) 637 - 644. 10.1088/0305-4608/5/4/008. Green open access

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Abstract

Interatomic potentials have been developed for heavy atom impurities in alkali metal hosts, and they have been used to calculate characteristic energies for the diffusion of gold in sodium and of silver in lithium. The calculations show that, whilst most impurity atoms should be present substitutionally, the diffusion is dominated by interstitial motion for both Li-Ag and Na-Au. The large difference in observed behaviour stems from the different forms of the interatomic potentials but cannot be described simply in terms of atomic radii or electronegativity arguments. The activation energies predicted are in good quantitative agreement with experiment.

Type:Article
Title:THEORY OF DIFFUSION OF HEAVY IMPURITIES IN ALKALI-METALS
Open access status:An open access version is available from UCL Discovery
DOI:10.1088/0305-4608/5/4/008
Publisher version:http://dx.doi.org/10.1088/0305-4608/5/4/008
Language:English
Additional information:Text made available to UCL Discovery by kind permission of IOP Publishing, 2012
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology

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