A free-energy functional for a crystal that contains both the symmetry
conserved and symmetry broken parts of the direct pair correlation function is
developed. The free-energy functional is used to investigate the
crystallization of fluids interacting via the inverse power potential ;
u(r)=ϵ(σ/r)n. In agreement with simulation results we find
that for n=12 the freezing is into close packed f.c.c structure while for
soft repulsions (n≤6) b.c.c phase is more stable.Comment: 9 pages, 2 figure