Which of the following lattices has the highest packing efficiency

 (i) simple cubic 

(ii) bodycentred cubic and

 (iii) hexagonal close-packed lattice? 

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1 Answers

Hexagonal close-packed lattice has the highest packing efficiency of 74%. The packing efficiencies of simple cubic and body-centred cubic lattices are 52.4% and 68% respectively. 

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