To determine the effect of the local intermolecular interactions on the crystalline phase behaviour of the POC B11, we implemented HPMC simulations on hard truncated tetrahedra with directional interactions between the facets. Here the hard truncated tetrahedra were decorated with sticky patches mimicking the intermolecular interactions through the potential V ij . This potential takes the same form as the interactions laid out in Ref. 20, where there are three components; V LJ , V ang , and V tor which correspond to a Lennard-Jones potential, angular, and torsional modulation term respectively: