Chemistry - Solid State Question with Solution | TestHub

In a close-packed lattice structure, if the number of atoms or spheres is $N$, then the number of tetrahedral voids is $2N$ and the number of octahedral voids is $N$.

A tetrahedral void is formed by four spheres, and an octahedral void is formed by six spheres.

Since there are $N$ octahedral voids for $N$ atoms, there is exactly one octahedral void associated with each atom, not two atoms. Therefore, the statement that there is one octahedral void associated with two atoms is incorrect.

Answer: There is one octahedral void associated with two atoms.