Volume and pressure dependence of Grüneisen parameter γ for solids at high temperatures

The present paper simply proposes a computing model for the volume and pressure dependence of the Grüneisen parameter γ at high temperatures. Applying it to ε-Fe, NaCl, Li, Na and K in different pressure ranges, we find that the calculated results of γ are in good agreement with the experimental data. Based on this modified model the thermal pressure Pth of NaCl is also investigated.