We hypothesize that a correlation exists between the complex morphology (concave polyhedron) and the open molecular packing. The co-existence of the concave structure might be related to patterns defining the "molecular" unit cell rather than the mathematical unit cell. We determined the orientation of the unit cell axes is relative to the crystal morphology (Figures and). The c-axis is perpendicular to the stellate profile, whereas the a and b axes pass through two tips of the star. The concave faces deviate by ~10° from a regular facet of a hexagonal prism. The twelve facets of the three crystals were indexed using CrysAlis Pro . We used crystallographic conventions to translate these facets into the corresponding morphology, which resulted in a dodecagonal prism with convex angles. However, these conventions are limited to convex polyhedral morphologies, further confirming the exceptionality of our crystals. The facets defining concave angles are related to each-other by mirror symmetry, in agreement with the 6/mmm point group.