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A compund is made of two elements P and ...

A compund is made of two elements `P` and `Q` are in `ccp` arrangement while atoms `P` occupy all the tetrahedral voids. What is the formula of the compound?

Text Solution

Verified by Experts

Atoms Q occupy 8 corners and 6 face - centre forming a ccp. Hence, their number per unit cell is 4.
Number of Tetrahedral voids = 8 (2 at each body diagonal)
`therefore` Number of .P. atoms = 8
Hence, formula of compound P : Q
8 : 4 or `P_(2)Q`.
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