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  4. LiCl has NaCl type structure with edge length 512 pm. Assuming that the Li+ ion is small enough that the chloride ions are in contact, then radius of Cl- ion is <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/2b7ca5e20380c5bfe20251d3df696ae0-.png />

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Q. $LiCl$ has $NaCl$ type structure with edge length $512$ pm. Assuming that the $Li^{+}$ ion is small enough that the chloride ions are in contact, then radius of $Cl^{-}$ ion is
image

The Solid State

Solution:

$\sqrt{2 a}=4 r_{C l}^{-}$
$4 r_{C l^{-}}=\frac{a \sqrt{2}}{4}=\frac{a}{2 \sqrt{2}}=\frac{512}{2 \sqrt{2}}$
$=361.8 pm \cong 362 pm$