The sources of disagreement between values of Delta Vf and Ef for vacancies in platinum determined by various experimental techniques were discussed. Systematic errors were investigated by using the same measuring apparatus for specimens in several quenching environments, including the first measurements on single crystals of platinum quenched in air, which yielded Ef = 1.15eV. It was argued that extrapolations of slow-quench data were as accurate as uncorrected fast-quench values. A best value of Delta Vf for single vacancies in platinum at 800C was 0.72 atomic volumes.

The Formation Volume and Energy of Single Vacancies in Platinum. R.M.Emrick: Journal of Physics F, 1982, 12[7], 1327-44