If the radius of `Br^(-)` ion is 0.182 nn, how large can a cation be fit in its tetrahedral holes ?

Explanation

For a tetrahedral void `(r^(+))/(r^(-))=0.225`
`therefore r^(+)=0.225 xx r^(-)`
`therefore r^(+)=0.225xx0.182=4.095xx10^(-2)nm`