 Quasi-crystals (supramolecular)

Quasicrystals are a fascinating class of materials that exhibit an ordered structure but do not have the periodic arrangement typically associated with crystalline materials. They are defined by their unique atomic arrangements, which can display symmetries that are not possible in conventional crystals. For example, quasicrystals can possess fivefold symmetry, which is forbidden in regular crystals due to the constraints of translational symmetry.