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Q.

In an ionic compound, anions from cubical-closest packing and cations occupy half of the tetrahedral void. The unit cell of this compound is known as

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a

fluorite

b

anti-fluorite

c

rock-salt

d

zinc-blende

answer is D.

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Detailed Solution

In zinc-sulphide unit cell, anions form cubical-closest packing and cations occupy half of tetrahedral voids.

Given that a Zn and S unit cell have the same amount of atoms, it is consistent with the formula ZnS. Thus, Zinc Blende's molecular or chemical formula will be as follows. Therefore, ZnS is the formula for zinc blend.

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