LiI occurs as cubical-closest packing.If the edge length of a unit cell is 624 pm,determine the ionic radii of $Li^+$ and $I^-$ ions.

Question

$\begin{array}{1 1}220.65pm,91.35pm\\120.65pm,81.35pm\\320.65pm,71.35pm\\420.65pm,101.35pm\end{array} $