ANALYSIS OF MELTING TEMPERATURE OF ALKALI-HALIDES UNDER THE EFFECT OF PRESSURE

The variation of melting temperature of alkali halides under the effect of pressure has been studied on the basis of three relations due to Simon, Kraut and Kennedy, and Reynolds et al. The calculations have been performed using high temperature data for the Gruneisen parameter, bulk modulus and its pressure derivatives. The compression data representing the pressure-volume relations have been predicted in the high temperature limit using the Murnaghan's equation of state and compared with the results based on the universal equation of state. A maximum in the melting curve at high pressure is obtained only for the results based on the relation given by Reynolds et al.