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 fcc 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 center of each face. $Zn^{2 +}$ions occupy half of the tetrahedral sites. $Zn^{2 +}$ion is surrounded by four $s^{2 -}$ions and each $S^{2 -}$ion is surrounded by four $Zn^{2 +}$ions.