What is the packing efficiency of body centred cubic unit cell?

The packing efficiency of a body centred cubic unit cell is 68%.

Packing efficiency

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

  1. The volume of Unit Cell
  2. Number of Atoms in a structure
  3. Volume of atoms

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