Question

In a closed packed lattice, the number of octahedral sites as compared to tetrahedral ones will be:

• A. equal
• B. half
• C. double
• D. triple

Answer 1

The correct option is B half

In a closed packed lattice, the number of octahedral sites as compared to tetrahedral ones will be half.

For example, a ccp lattice contains $4$ atoms per unit cell. It has $4$ octahedral voids and $8$ tetrahedral voids.

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