Question

In zinc blende structure,

• A. zinc ions occupy half of the tetrahedral sites
• B. each $Zn^{2+}$ ion is surrounded by six sulphide ions
• C. each $S^{2-}$ ion is surrounded by six $Zn^{2+}$ ions
• D. it has fee structure

Answer 1

Answer: (A)

zinc ions occupy half of the tetrahedral sites

Answer 2

$ZnS$ has a $ccp$ structure. $S^{2-}$ ions are present at the corners of the cube and centre of each face. $Zn^{2+}$ ions occupy half of the tetrahedral sites. Each $Zn^{2+}$ ion is surrounded by four $S^{2-}$ ions and each $S^{2-}$ ion is surrounded by four $Zn^{2+}$ ions.