The packing efficiency of a body centred cubic unit cell is 68%.
The packing efficiency is the fraction of the crystal (or unit cell) actually occupied by the atoms. It is usually represented by a percentage or volume fraction.
Mathematically Packing Efficiency is:
Number of atoms × volume occupied by 1 share × 100/Total volume of unit cell × 100
Factors Affecting Packing Efficiency
- The volume of Unit Cell
- Number of Atoms in a structure
- Volume of atoms