Question

The coordination number of $Z{n}^{2+}$ and $S^{2-}$ ions in the zinc blende ZnS type structure is:

• A. $4:4$
• B. $6:6$
• C. $8:8$
• D. $4:8$

Answer 1

The correct option is A $4:4$

In zinc blende structure (ZnS), sulphide ions are face-centred and zinc is present in alternate tetrahedral voids. Formula is ZnS. Coordination number of Zn is $4$ and that of sulphide is $4$. Other substance that exists in this kind of a structure is BeO.