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

a. 1

b. 4

c. 8

d. 6

Ans. c

Explanation : In the diamond cubic unit cell there are eight corner atoms, six face centered atoms and four more atoms inside the structure.

Number of atoms present in a diamond cubic unite cell

= 1 + 3 + 4 = 8 atoms.

(15)