About the Hexagonal Lattice
The hexagonal system has a unique lattice with a = b ≠ c and γ = 120°. HCP is a close-packed variant with ABAB stacking and 74% packing efficiency.
Crystal Properties
Coordination Number
12
Packing Efficiency
74% (HCP)
Hexagonal SystemClose-Packed Structures
Common Examples
MagnesiumZincTitanium (α)CobaltCadmium
Related topics: hexagonal lattice, HCP structure, hexagonal close packed, magnesium crystal, zinc titanium cobalt