If the number of close packed sphere be N, then the number of octahedral and tetrahedral voids generated respectively are A and B that refers to
A. 2N, N
B. 3N, N
C. 3N, N
D. N, 2N
A. 2N, N
B. 3N, N
C. 3N, N
D. N, 2N
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Correct Answer – D
Octahedral voids = number of lattice point
2 x octahedral voids – tetrahedral voids
N, 2N are the voids .