Vacancy formation volume in indium from positron-annihilation measurements

Abstract
An equilibrium method for the determination of the vacancy formation volume in many metals is provided by the trapping of positrons at vacancies. Utilizing a Bridgman press and angular-correlation counting techniques, the vacancy formation volume in metallic indium has been determined to be 6.1 ± 0.2 cm3/mole, or 39 ± 1% of the molar volume.