An estimate is made of the elastic relaxation around a vacancy in solid argon when the three-body interaction of Jansen and Zimering is included in the crystal potential. An isotropic elastic continuum model and the lattice theory of Kanzaki give similar results and predict a negative volume change per vacancy from elastic relaxation of the order of 25% of an atomic volume.
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A.J.E. Foreman (1963) studied this question.
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