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  4. How many number of atoms are present in f c c unit cell?

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Q. How many number of atoms are present in $f c c$ unit cell?

The Solid State

Solution:

In face-centred cubic structure $8$ atoms at corners and six at the centre of each face are present, the contribution

will be $=8 \times \frac{1}{8}+6 \times \frac{1}{2}=1+3=4$ atoms per unit cell.