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NEET levelSingle correct optionDifficulty 1 of 3ss168

In zinc blende, $ZnS$ , the sulphide ions form a ccp lattice and the $Zn X^{2 +}$ ions occupy

Ahalf of the octahedral voids
Ball the octahedral voids
Call the tetrahedral voids
Dhalf of the tetrahedral voids

Answer: D

A ccp lattice of 4

S X^{2 -}

ions has 8 tetrahedral voids. To match the formula

ZnS

only 4 of them are filled by

Zn X^{2 +}

, i.e. half of the tetrahedral voids.

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