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Question -

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



Answer -

(i) Face-centred cubic

(ii) Face-centred tetragonal

(iii) Body-centred

Answer

(i) There are 14 (8 from the corners + 6 from the faces) latticepoints in face-centred cubic.

(ii) There are 14 (8 from the corners + 6 from the faces) latticepoints in face-centred tetragonal.

(iii) There are 9 (1 fromthe centre + 8 from the corners) lattice points in body-centred cubic.

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