Close packing is maximum in the crystal lattice of (A) Face-centred cubic (B) Body-centred cubic (C) Simple cubic (D) Primitive cube

Close packing is maximum in the crystal lattice of face-centred cubic

The packing efficiency of face-centred cubic lattice is 74%

The packing efficiency of body-centred cubic lattice is 68%

The packing efficiency of simple cubic lattice is 52.4%

Therefore, it is minimum in the crystal lattice of simple cubic unit cell and maximum in the crystal lattice of face-centred cubic

So, the correct option is (A)

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