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The number of tetrahedral and octahedral...

The number of tetrahedral and octahedral voids in CCP unit cell are respectively

A

4,8

B

8,4

C

12,6

D

6,12

Text Solution

Verified by Experts

The correct Answer is:
B
In a closed packed structure [CCP or HCP ] if there are n spheres ( atoms or ions ) in packing then
Number of octahedral voids =n
Number of tetradral voids = 2n
In CCP ,
Number of atoms = 4
So number of coctahedral voids =4
Number of tetrehedral voids = 8
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