What will be the percentage of free space in bcc lattice ?
A
32
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B
68
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C
72
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D
no free space
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Solution
The correct option is D 32 The ratio of volumes occupied by atoms in a unit cell to the total volume of the unit cell is called as packing fraction. For body centred cubic structure, packing fraction = 0.68 i.e., 68% of the unit cell is occupied by atoms and 32% is empty.