Abstract
Abstract Combined techniques of molecular beam effusion from a Knudsen cell and of positive surface ionization on a heated polycrystalline rhenium filament were employed to determine the vapor pressures P (in atm) of LiI and KCl as a function of cell temperature T (in K), thereby yielding the equations: log10P(LiI)=(7.498±0.046)−(9254±30)⁄T for 583–717 K, log10P(KCl)=(7.210±0.058)−(11135±45)⁄T for 687–877 K. The present data on the pressure and on both entropy and enthalpy of sublimation are compared with others in literature.
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