An atomistic study is presented on the phase stability, interatomic distances and lattice parameters of the new actinide intermetallic compounds  Calculations are based on a series of interatomic pair potentials related to the actinides and transition metals, which are obtained by lattice inversion method. Calculated results show that the calculated lattice parameters coincide quite well with experimental values. Moreover, the phonon densities of states, specific heat and vibrational entropy related to dynamic phenomena are evaluated for the first time. A qualitative analysis is carried out with the relevant potentials for the vibrational modes.