Isothermal bulk modulus for solids at high pressures

In the present paper, we propose a new computing model for the volume dependence of the isothermal bulk modulus BT. Applying it to the experimental data for NaCl, H2, D2, Ne and MgO at different pressure ranges, the calculated results are in good agreement with the experiment and thus show that our theory can be applied for predicting the behavior of solids at high pressures. The new parameter s, introduced in our model, does link the parameters B0, B0' and B0'', and thus has an important physical meaning