Correct Answer - Option 2 : 0.74
Explanation:
Atomic Packing Factor:
Packing factor is the fraction of the volume of a unit cell that is occupied by "hard sphere" atoms or ions.
It is the sum of the sphere volumes of all atoms within a unit cell (assuming the atomic hard - sphere model) divided by the unit cell volume (total volume).
The atomic packing factor of different crystal structures is given in the table below:
|
Structure
|
Atomic packing factor
|
|
BCC
|
0.68
|
|
HCP
|
0.74
|
|
FCC
|
0.74
|
|
Diamond cubic
|
0.34
|
|
SC
|
0.52
|
