In a closed packed array of $N$ spheres, the octahedral holes are

N / 2

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2 N

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4 N

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N

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Solution

The correct option is D $N$
In a closed packed array of N spheres, the number of tetrahedral holes is 2N and the number of octahedral holes is N. For example, fcc unit cell has 4 atoms per unit cell. It has 4 octahedral and 8 tetrahedral voids.

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In a closed packed array of N spheres, the octahedral holes are

The correct option is D NIn a closed packed array of N spheres, the number of tetrahedral holes is 2N and the number of octahedral holes is N. For example, fcc unit cell has 4 atoms per unit cell. It has 4 octahedral and 8 tetrahedral voids.

In a closed packed array of $N$ spheres, the octahedral holes are

The correct option is D $N$
In a closed packed array of N spheres, the number of tetrahedral holes is 2N and the number of octahedral holes is N. For example, fcc unit cell has 4 atoms per unit cell. It has 4 octahedral and 8 tetrahedral voids.