Abstract
Recent measurements by the positron-annihilation technique showed that the vacancy-formation volume vf in metallic indium is 6.1+or-0.2 cm3 mol-1. Self-diffusion under pressure showed that its vacancy activation volume vact is 8.1+or-0.4 cm3 mol-1. The application of a recent macroscopic model shows that vf lies between 5.5 and 7 cm3 mol-1 whereas vact is calculated to be between 9.9 and 8.3 cm3 mol-1. For tin the calculated value for the activation volume is 4.73 cm3 mol-1 whereas the experimental value is 5.3+or-0.5 cm3 mol-1.
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