EQUATIONS OF STATE AND PRESSURE-DEPENDENCE OF BULK MODULUS FOR NACL-CRYSTALS

Various equations of state reported in the literature are used to inve stigate the variation of the bulk modulus for NaCl crystals under the effect of pressure up to 300 x 10(8) Pa. The results are compared with the corresponding values obtained in the present study using interion ic potentials as well as with the available experimental data. Values of bulk modulus as a function of pressure are also calculated by takin g into account the variation of the Anderson parameter with pressure. The results thus obtained are found to present best agreement with tho se estimated from the universal equation of state.