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A cubic solid is made up of two atoms A and B. Atoms A are present at the corners and B at the centre of the body. What is the formula of the unit cell ?

Answer» Contribution by the atoms A present at eight corners = 1
Contribution by the atom B present in the centre of the body = 1
Thus, the ratio of atoms of A : B = 1 : 1
Formula of unit cell = AB


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