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We study partially occupied lattice systems of classical magnetic dipoleswhich point along randomly oriented axes. Only dipolar interactions are takeninto account. The aim of the model is to mimic collective effects in disorderedassemblies of magnetic nanoparticles. From tempered Monte Carlo simulations, weobtain the following equilibrium results. The zero temperature entropyapproximately vanishes. Below a temperature T_c, given by k_B T_c= (0.95 +-0.1)x e_d, where e_d is a nearest neighbor dipole-dipole interaction energy andx is the site occupancy rate, we find a spin glass phase. In it, (1) the meanvalue <|q|>, where q is the spin overlap, decreases algebraically with systemsize N as N increases, and (2) D|q| = 0.5 <|q|> (T/x)^1/2, independently of N,where D|q| is the root mean square deviation of |q|.

Equilibrium spin-glass transition of magnetic dipoles with random anisotropy axes on a site diluted lattice