Hexagonal close packing is one of two crystal structures that derive from stacking close-packed-planes of hard sphere atoms. ... The lattice of the hexagonal close packed crystal is hexagonal and a ...

The hexagonal close-packed (hcp) structure is a highly rare phase of high-entropy metals, however, this highly desirable structure is often attributed to increasing the hardness and ductility of the ...

The structure can be visualized as a stacking of octahedral layers and oxygen-deficient hexagonal close-packed AO 3 – δ (h’) layers (A is a large cation such as Ba²⁺ and δ represents the ...