Question
Chemistry Question on Unit Cells
The octahedral voids in a face-centred cubic (fee or ccp) structure are located at
A
6 at edge centres and 8 along body diagonals
B
12 at edge centres and one at body centre
C
8 along body diagonal and 6 at edge centres
D
all the edge centres only
Answer
12 at edge centres and one at body centre
Explanation
Solution
In fee or cep, 12 octahedral voids are present at edge centres and one at the body centre.