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HEXAGONAL CLOSE-PACKED STRUCTURE
HCP STRUCTURE •ideal ratio c/a of 8/3 1.633 •unit cell is a simple hexagonal lattice with a two-point basis (0,0,0) (2/3,1/3,1/2) a a Plan view •{0002} planes are close packed •ranks in importance with FCC and BCC Bravais lattices 72
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