EQUATION OF STATE FOR GRAPHITE AND DIAMOND

A. H. Averin, A. T. Sapozhnikov
VANT. Ser.: Mat. Mod. Fiz. Proc. 1995. Вып.3. С. 9-14.

      An equation of state is proposed for graphite and diamond to compute the pressure and specific internal energy from density and temperature. The pressure and energy are thermodynamically consistent. The potential components of pressure and energy are described using Born-Meyer theory. The Gruneisen coefficient depends only on density for diamond and on temperature for graphite.      The equation of state describes well the experimental data on shock compressibility, heat capacity, thermal expansion and phase equilibrium. It can be used in computational models and codes for graphite-diamond phase transition under dynamic leads.