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Question

Match the following unit cell with number of atoms present in the unit cell

A
1
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B
4
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C
2
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Solution

The correct option is
For simple cubic unit cell,8 atoms on its corners, the total number of atoms in one unit cell is
8 corners ×18 per corner atom=1For body centered cubic unit cell, 8 atoms in its corner and 1 atom in the centre.
1body centered atom+8 corner ×18per corner atom=2For face centered cubic unit cell, 8 atoms in its corner,6 face centered atoms shared by 2 unit cell
8 corners × 18 per corner atom = 16 atoms ×12 atoms per unit cell = 31+3 =4

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