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  4. In zinc blende structure, the coordination number of the cation is

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Q. In zinc blende structure, the coordination number of the cation is

J & K CETJ & K CET 2011The Solid State

Solution:

Zinc blende $(ZnS)$ has fee structure. It is an ionic crystal having $4: 4$ coordination number. $S^{2-}$ form fee lattice and $Zn ^{2+}$ has alternate tetrahedral voids. Hence, in zinc blende structure, the coordination number of cation $\left( Zn ^{2+}\right)$ is $4$ .