Chemistry - Solid State Question with Solution | TestHub

Let the number of anions B in the hcp array be $N$.

The number of octahedral voids in a close-packed structure is equal to the number of packing atoms, which is $N$.

Since cations A occupy all the octahedral voids, the number of cations A is also $N$.

The ratio of the number of atoms of A to B is $N:N=1:1$.

Therefore, the formula of the compound is $\text{AB}$, which gives $x=1$ and $y=1$.

Answer: $x=1$ and $y=1$