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-centered

Answer»

Solution :(i)`"Lattice points in FACE-CENTRED CUBIC lattice "="8 (at corners)" +" 6 (at the face centre)"= 14`
(ii) `"Face centred TETRAGONAL "= "8 (at corners) "+ "6 (at the face centre) "= 14`
(iii)`"Lattice points in body-centred cube "= "8 (at corners)" +"1 (at the body centre)" = 9`


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