Critical Temperature for Phase Separation of the Solid Solutions of Rare Gases

Abstract

THE rare gases argon and krypton form a solid solution at 77° K. that shows a positive deviation from Raoult's law¹. At this temperature, the tendency toward phase separation may be estimated from the value of the energy of mixing parameter w _AB/kT of about 1.3. This value was estimated by the use of the crude treatment of regular solutions² on data taken in an apparatus not primarily designed for the task.