Anisotropic compression in dimer C-60 fullerene solid

Dimer C-60 solids are monoclinic crystals with molecular longer axis aligne d along the c-axis. A simple model based on atom-atom potential used to cal culate various bulk, structural and thermodynamic properties of this fuller ite, has also been used to investigate the pressure and temperature depende nt properties such as bulk modulus, lattice and orientational structure, ph onon dispersion relations, Gruneisen parameters, heat capacity and entropy. An important feature of this solid evidently concerns its anisotropic pres sure compression. We calculate these directional compressibilities and find the anisotropy for pressure compression very significant. It is expected t hat the properties of dimer solid C-60 calculated here will motivate furthe r experimentation on this solid.