How many lattice points are there in one unit cell of each of the foll – InterviewSolution

1.	How many lattice points are there in one unit cell of each of the following lattice?(i) Face-centred cubic (ii) Face-centred tetragonal (iii) Body-centred
Answer» Lattice points in face centred cubic or face centred tetragonal = 8 (at corners) + 6 (at face centres) = 14 However, particles per unit cell 8 x 1/8 + 6 x 1/2 = 4 lattice points in body centred cube = 8 (at comers) + 1 (at body centre) = 9. However, particles per unit cell = 8 x 1/8 + 1 = 2

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