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Atoms of elements B from hep lattice and...

Atoms of elements `B` from hep lattice and those of element `A` occupy two-thirds of tetrahedral voids. What is the formula of the compound formed by elements `A` and `B`?

Text Solution

Verified by Experts

The correct Answer is:
7
Suppose number of atoms N in hcp lattice = n
No. of tetrahedral voids = 2n
No. of M atoms = `2/3 xx 2n = (4n)/(3)`
Formula = `M_((4n)/(3)) N_(n) " or " M_(4/3) N_(1) " or " M_4N_3`.
Total number of M and N atoms = 7.
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