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^+ = 0.225xxr^-`
`therefore r^+ = 0.225 xx 0.182 = 4.095 xx10^(-2)` nm