Explain how much portion of an atom is located at (a) Corner and (b) Body centre of a cubic unit cell is part of its neighbouring unit cell.
(a) A point lying at the corner of a unit cell is shared equally by eight unit cells and therefore, 1/8 of each such point belongs to the given unit cell. (b) A body centred point belongs entirely to one unit cell since it is not shared by any other unit cell.
