HCP is one of several possible atomic arrangements in crystalline materials. Another common structure is the Face-Centered Cubic (FCC) lattice, where atoms are arranged at the corners and centers of each face of the cube. While both HCP and FCC are close-packed structures, they differ in their stacking sequences. HCP follows an ABAB stacking pattern, whereas FCC uses an ABCABC pattern. These differences result in varied properties and applications for nanomaterials with these structures.
