Question

The number of tetrahedral voids present in a bcc lattice is:

• A. $4$
• B. $2$
• C. $1$
• D. $8$

Answer 1

The correct option is A $4$

There is a simple way to calculate the number of Tetrahedral Voids in a lattice. Here if the number of spheres (i.e. unit cells) is said to be “n”, then the number of voids will be twice as many. So the number of tetrahedral voids will be “2n”.

As bcc has $2$ atoms per unit cell, the number of tetrahedral voids $=2\times 2=4$

Hence, the correct option is $\text{A}$