  Periodic microphases universally emerge in systems for which short-range
inter-particle attraction is frustrated by long-range repulsion. The
morphological richness of these phases makes them desirable material targets,
but our relatively coarse understanding of even simple models limits our grasp
of their assembly. We report here the solution of the equilibrium phase
behavior of a microscopic microphase former through specialized Monte Carlo
simulations. The results for the ordered regime qualitatively agree with a
Landau-type free energy description and highlight the nontrivial dynamical
interplay between micelle, gel and microphase formation.
