We present a model equation of state for C60 based on a variational series mean
spherical approximation for a double Yukawa fluid. This allows us to investigate the liquid–
vapour coexistence curve and calculate the thermodynamic properties of liquid C60. The
comparisons with computer simulation results, based on the Girifalco potential, suggest the
importance of treating the attractive tail of the potential accurately. The estimated critical
parameters, Tc= 1943 K, ρc= 0. 477 nm− 3 and Pc= 34. 2 bar, are in good agreement with ...