Hexagonal Close Packed (HCP) Structure
Category : JEE Main & Advanced
The HCP structure also maximizes the packing fraction
(1) \[a=b\ne c\]
(2) Number of atoms per unit cell = 6
(3) The volume of the hexagonal cell = \[3\sqrt{2}\,{{a}^{3}}\]
(4) The packing fraction \[=\frac{\pi \sqrt{2}}{6}\]
(5) Coordination number = 12
(6) Magnesium is a special example of HCP lattice structure.
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