Sublimation Pressures of Solid Ar, Kr, and Xe

Abstract

Results of an experiment to measure the sublimation pressures of Ar, Kr, and Xe over wide temperature and pressure ranges are presented. Data are reported from near the respective triple points to about (2.3 × ${10}^{-6\mathrm{}}$ Torr, 25.506 K) for Ar; (2.1 × ${10}^{-4\mathrm{}}$ Torr, 45.130 K) for Kr; (3.8 × ${10}^{-4\mathrm{}}$ Torr, 70.075 K) for Xe. Pressures were measured with a Hg manometer, a McLeod gauge, and a calibrated Bourdon gauge. The data have been corrected for thermomolecular flow and streaming. Temperatures were measured with a N.B.S.-calibrated Pt resistance thermometer. The application of the law of corresponding states is investigated. Values for static lattice energy, geometric mean of the lattice vibrational spectrum, heat of sublimation, and lattice vibrational energy are calculated using theoretical sublimation pressure curves.