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Cubic unit cells: packing efficiency and density
NEET level
Single correct option
Difficulty 1 of 3
ss007
A crystal has
N
atoms in a ccp arrangement. The number of octahedral voids in it is
A
2
N
B
4
N
C
N
/2
D
N
Answer: D
In a close-packed structure each atom is associated with one octahedral void and two tetrahedral voids, so there are
N
octahedral voids.
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