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Question

In closed packed lattice containing n particles, the numbers of tetrahedral and octahedral voids are

A
n,2n
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B
n,n
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C
2n,n
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D
2n.n/2
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Solution

The correct option is C 2n,n
In closed packed lattice containing ′n′
particles, the numbers of tetrahedral and octahedral voids are 2n and n respectively.
For example, fcc unit cell has 4 atoms per unit cell. It has 8 tetrahedral and 4 octahedral voids respectively.

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