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Question -

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



Answer -

(i)┬аFace-centred cubic

(ii)┬аFace-centred tetragonal

(iii)┬аBody-centred

Answer

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

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

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

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