Calculate the number of atoms in a cubic based unit cell having one atom on each corner and two atoms on each body diagonal.

Calculate the number of atoms in a cubic based unit cell having one at

1.	Calculate the number of atoms in a cubic based unit cell having one atom on each corner and two atoms on each body diagonal.
Answer» Solution :There are four BODY diagonals .THUS, there are 8 atoms WITHIN the body of the UNIT cell which are not shared by any other unit cell. CONTRIBUTION by atoms at the corners =`8xx1/8=1` hence, total atoms/unit cell =8+1=9