👉 In crystallography, a hemicrystalline structure is an arrangement of atoms in a periodic lattice that has a single crystal plane. It consists of two or more layers of atoms arranged in such a way that they are coplanar and perpendicular to each other. Hemicrystalline structures are one of the most common types of crystalline structures, as they represent the simplest forms of crystals. In hemicrystalline structures, atoms do not form single crystal