Statistical mechanical study of thermodynamic properties of a family of fullerites from C36 to C96 in the equilibrium with their vapors

The temperature dependence of saturated vapor pressure of fullerites C36-C96 and their thermodynamic properties along with the sublimation curves up to the spinodal are calculated. The saturated vapor pressures along all the range of temperatures are approximated by logPsat = A - (B/T) - CT. The coefficient A practically does not depend on the number of atoms in the molecule (varying only by 2.2%), B increases noticeably while C decreases from the C36 to the C96, both of them by approximately two. The isothermal bulk modulus BT and the shear modulus C44 vanish at the spinodal points. © 2004 Taylor & Francis Group, LLC.