Which of the following ionic solids has the highest packing efficiency?
The correct answer is option (c)also known as zinc sulfide, has a highest packing efficiency among the given options.
has a zincblende structure, which has a cubic close-packed (CCP) arrangement of both cations
and anions
in which they occupy alternate positions. This arrangement results in the highest packing efficiency of approximately 74%, which is the maximum possible packing efficiency for ionic solids.
(sodium chloride),
(cesium chloride), and
(calcium fluoride) have different crystal structures with lower packing efficiencies compared to
Hence, the correct answer is option (c)