The number of carbon atoms per unit cell of diamond unit cell is:

24 2013 NEET The Solid StateUnit cells Easy
The number of carbon atoms per unit cell of diamond unit cell is:
A 1
B 4
C 8
D 6

Detailed Solution

The diamond cubic unit cell has eight corner atoms, six face-centred atoms and four more atoms inside the cell.
Number of atoms $= 8\times\frac{1}{8} + 6\times\frac{1}{2} + 4 = 1 + 3 + 4 = 8$

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