  We describe the crystalline phase of color superconducting quark matter. This
phase may occur in quark matter at densities relevant for compact star physics,
with possible implications for glitch phenomena in pulsars. We use a
Ginzburg-Landau approach to determine that the crystal has a
face-centered-cubic (FCC) structure. Moreover, our results indicate that the
phase is robust, with gaps, critical temperature, and free energy comparable to
those of the color-flavor-locked (CFL) phase. Our calculations also predict
``crystalline superfluidity'' in ultracold gases of fermionic atoms.
