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

Options

A. zinc ions occupy half of the tetrahedra 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

A

Explanation

ZnS has a ccp structure `S^(2-)` ions are paresnet at the corners of the and centre of face. `Zn^(+)`ions occupy half of the tetrahedral sites. Each `Zn^(2+)` ions is surrounded by four `S^(2-)` ions and each `S^(-2)` ion in sorrounded by four `Zn^(2+)` ion is sorrounded by four `Zn^(2+)` ions.