in a body centred cubic structure, the space occupied is about (a) 74% (b) 20 %(c)68percent (d)52.4%
Answers
Answered by
1
Answer:
68
Explanation:
In body centered cubic structure the space occupied is about (a) 68%
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Answered by
0
Answer:
68 percent
Explanation:
a body centred cubic unit cell atoms are present at the corners of the unit cell and one atom occupy the center of the unit cell.
Therefore Z
eff
of the unit cell =
8
1
×8+1=2
Packing fraction of the unit cell =
Volume of unit cell
Volume occupied by the atoms
In BCC, atoms touch along the body diagonal of the unit cell therefore, we can write
3
a=4r
Packing fraction =
a
3
Z
eff
×
3
4
πr
3
=
(
3
4r
)
3
2×
3
4
πr
3
=
8
3
π
=0.68
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