How many lattice points are there in one unit cell of each of the following lattice?

(i) Face-centred cubic

Solution: One unit cell of a face- centered cubic has 8 lattice points are corners and 6 lattice points at faces, total 14 lattice points.

(ii) Face-centred tetragonal

Solution: One unit cell of face- centered tetragonal has 8 lattice points are corners and 6 lattice points at faces, total 14 lattice points.

(iii) Body-centred

Solution: One unit cell of body centered has 8 lattice points are corners and 1 lattice points at faces, total 9 lattice points.