Explain how much portion of an atom located at corner and body centre of a cubic unit cell is part of its neighbouring unit cell.

Explanation

i. An atom at the C0rner is shared by eight adjacent unit cells. Hence, portion of the atom at the C0rner that belongs to one unit cell =1/8


ii. The atom at the body centre of a cubic cell is not shared by any other unit cell. Hence, it belongs fully to the unit cell.