Which of the following lattices has the highest packing efficiency ? (i) Simple cubic (ii)body-centred cubic (iii) hexagonal close-packed lattice..

Which of the following lattices has the highest packing efficiency ?

1.	Which of the following lattices has the highest packing efficiency ? (i) Simple cubic (ii)body-centred cubic (iii) hexagonal close-packed lattice..
Answer» SOLUTION :packing efficiencies are : simple CUBIC = 52.4% , BODY - centred cubic = 68% , HEXAGONAL close-packed = 74 % thus, hexagonal close - packed lattice has the highest packing EFFICIENCY.