Question

The 8 : 8 type of packing is present in

• A. $Mg{F}_2$
• B. $CsCl$
• C. $KCl$
• D. $NaCl$

Answer 1

The correct option is B $CsCl$

In Cesium chloride crystal lattice $\left(CsCl\right)$, Each $C{s}^{+}$ is surrounded by $8C{l}^{-}$. So, the $C{s}^{+}$ coordination number is $8$ at the corners of each cube.

Each $C{l}^{-}$ is also surrounded by $8C{s}^{+}$ at the corners of a cube, so the $C{l}^{-}$ has coordination is $8.$

Hence, the correct option is $B$