Question

In Zinc blende structure, anions are arranged in ccp and cations are present in the tetrahedral voids and only half the tetrahedral voids are occupied.
The coordination numbers of cation and anion are __________ respectively.

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

Answer 1

Answer: (B)

$4$ and $4$

Zinc Blende has the formula of $ZnS$.
It has the same coordination number for both cation and anion equal to $4$. Both ions have tetrahedral coordination.