Chemistry - Solid State Question with Solution | TestHub

For NaCl like structure.

The radius ratio should be

$\Rightarrow 0.414\to 0.732$

$\frac{{\mathrm{r}}^{+}}{{\mathrm{r}}^{-}}=\frac{100}{{\mathrm{r}}_{\mathrm{m}\mathrm{a}\mathrm{x}}^{-}}=0.414$;

$\frac{100}{{\mathrm{r}}_{\mathrm{m}\mathrm{i}\mathrm{n}}^{-}}=0.732$;

$\therefore {\mathrm{r}}_{\mathrm{m}\mathrm{a}\mathrm{x}}^{-}=\frac{100}{0.414}=241.3\mathrm{ }\mathrm{P}\mathrm{m}$;

$\therefore \mathrm{ }{\mathrm{r}}_{\mathrm{m}\mathrm{i}\mathrm{n}}^{-}=\frac{100}{0.732}=136.6\mathrm{ }\mathrm{P}\mathrm{m}$;