Heuristic rule for binary superlattice coassembly: Mixed plastic   mesophases of hard polyhedral nanoparticles
  Sought-after ordered structures of mixtures of hard anisotropic nanoparticles can often be thermodynamically unfavorable due to the components' geometric incompatibility to densely pack into regular lattices. A simple compatibilization rule is identified wherein the particle sizes are chosen such that the order-disorder transition pressures of the pure components match (and the entropies of the ordered phases are similar). Using this rule with representative polyhedra from the truncated-cube family that form pure-component plastic-crystals, Monte Carlo simulations show the formation of plastic-solid solutions for all compositions and for a wide range of volume fractions. 
Mihir R. Khadilkar, Fernando A. Escobedo
cond-mat.soft cond-mat.mtrl-sci cond-mat.stat-mech physics.chem-ph