Question

Coordination numbers of $Z{n}^{2+}$ and $S^{2-}$ in the crystal structure of wurtzite are :

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

Answer 1

Answer: (A)

$4,4$

Coordination numbers of $Z{n}^{2+}$ and $S^{2-}$ in the crystal structure of wurtzite are $4,4$. Sulphide ions occupies ccp while zinc ions occupy alternate tetrahedral voids. Number of formula units per unit cell is 4.