Explain how much portion of an atom located at
of a cubic unit cell is part of its neighboring unit cell.
�(i)An atom located at the corner of a cubic unit cell is shared by eight
adjacent unit cells.
�Therefore,�1/8 portion of the atom is shared by one unit cell.
�(ii)An atom located at the body centre of a cubic unit cell is not shared
by its neighboring unit cell. Therefore, the atom belongs only to the unit cell
in which it is present i.e., its contribution to the unit cell is 1.