If N is the number of spheres in the unit cell, then total number of octahedral voids is the cell is .
A
2N
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B
3N
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C
N
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Solution
The correct option is C N Total number of octahedral voids is equal to the Zeff of any unit cell. If N is the Zeff, which is the number of spheres (by spheres we mean effective spheres), the number of octahedral voids is N.