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Question
Explainhow much portion of an atom located at (i)corner and (ii)body-centre of a cubic unit cell is part of its neighbouring unitcell.
Explainhow much portion of an atom located at (i)corner and (ii)body-centre of a cubic unit cell is part of its neighbouring unitcell.
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Solution
(i)Anatom located at the corner of a cubic unit cell is shared by eightadjacent unit cells.
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portionof the atom is shared by one unit cell.
(ii)Anatom located at the body centre of a cubic unit cell is not shared byits neighbouring unit cell. Therefore, the atom belongs only to theunit cell in which it is present i.e., its contribution to the unitcell is 1.
(i)Anatom located at the corner of a cubic unit cell is shared by eightadjacent unit cells.
Therefore,portionof the atom is shared by one unit cell.
(ii)Anatom located at the body centre of a cubic unit cell is not shared byits neighbouring unit cell. Therefore, the atom belongs only to theunit cell in which it is present i.e., its contribution to the unitcell is 1.
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