The number of octahedral and tetrahedral sites in a cubical close packed array of N spheres respectively is
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a
N and 2N
b
N/2 and N
c
2N and N
d
4N and 2N
answer is A.
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Detailed Solution
Number of octahedral sites = number of spheres in packingNumber of tetrahedral voids = 2 × number of spheres in packingNumber of tetrahedral voids = 2 × octahedral voidsSo, the answer is N and 2N.