Question

In a cubic unit cell of bcc structure, the lattic points (i.e., number of atoms) are:

• A. 2
• B. 6a
• C. 8
• D. 12
• E. 5

Answer 1

Answer: (A)

Number of lattice points in a crystal structure will be
$n=\frac{N_C}{8}+\frac{N_F}{2}+\frac{N_1}{1}$
In bcc crystal, $N_C=8,N_F=0$
and $N_i=1$
$n=\frac{8}{8}+\frac{0}{1}+\frac{1}{1}=2$