The correct coordination number for the zinc | vedclass

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Question

(A) In the zinc blende structure $(ZnS)$,the sulphide ions $(S^{2-})$ form a face-centred cubic $(fcc)$ lattice. Zinc ions $(Zn^{2+})$ occupy alternat

Vedclass · Accepted Answer

$4$

Vedclass · Answer

(A) In the zinc blende structure $(ZnS)$,the sulphide ions $(S^{2-})$ form a face-centred cubic $(fcc)$ lattice. Zinc ions $(Zn^{2+})$ occupy alternate tetrahedral voids. Since each $Zn^{2+}$ ion is surrounded by $4$ $S^{2-}$ ions and each $S^{2-}$ ion is surrounded by $4$ $Zn^{2+}$ ions,the coordination number for both ions is $4:4$. Therefore,the coordination number for the zinc ion is $4$.

The correct coordination number for the zinc ion in the zinc blende crystal structure is:

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