Compressibility of Metal-Ammonia Solutions

The compressibility of concentrated metal-ammonia solutions has been calculated. The solutions are assumed to be binary alloys of solvated metal ions (including the first solvation layer as part of the ion) and ammonia. The isothermal compressibility κT is computed from the structure factor, which is computed from the Aschroft adaptation of the Lebowitz solution of the Percus-Yevick equation for hard spheres. In the absence of adequate data on κT, the results of the computation are compared to data on the adiabatic compressibility κS.