Chemistry - Solid State Question with Solution | TestHub

For NaCl type structure $\frac{r_{A^{+}}}{r_{B^{-}}}=0.414-0.737$ For maximum possible radius of $B^{-}$ $\begin{array}{rl}& \frac{r_{A^{+}}}{r_{B^{-}}}=0.414,\frac{170}{r_{B^{-}}}=0.414\\ & r_{B^{-}}=\frac{170}{0.414}=410.6\mathrm{pm}\end{array}$