Adiabatic compressibility of solid gases

Abstract

Adiabatic compressibilities of solidCO (20–67 K) and NH3 and ND3 (90–190 K) have been determined with an ultrasonic method. The temperature dependence of adiabatic compressibility is discussed for two groups of molecular crystals: solid inert gases (Ar, Kr, Xe, Ne) and a number of simple molecular crystals with nonspherical particles (CO, CO2, NH3, ND3). The effect of orientational disordering processes on molecular crystal compressibilities has been considered.