packing fraction of a unit cell is drfined as the fraction of the total volume of the unit cell occupied by the atom(s). `P.E=("Volume of the atoms(s) present in a unit cell")/("Volume of unit cell")=(Zxx(4)/(3)pir^(3))/(a^(3))` and `%` of empty space = `100- P.F.xx100 ` where Z= effective number of stoms in s cube . r= radius of a an atoms a = edge lenght of the cube Packing fraction in face centered cubic unit cell is :
A
0.7406
B
0.6802
C
0.5236
D
None of these
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The correct Answer is:
A
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packing fraction of a unit cell is drfined as the fraction of the total volume of the unit cell occupied by the atom(s). P.E=("Volume of the atoms(s) present in a unit cell")/("Volume of unit cell")=(Zxx(4)/(3)pir^(3))/(a^(3)) and % of empty space = 100- P.F.xx100 where Z= effective number of stoms in s cube . r= radius of a an atoms a = edge lenght of the cube % of energy space in body centered cubic cell unit is nearly :
The volume of the HCP unit cell is
The packing fraction of the primitive cubic unit cell is
The fraction of the total volume occupied by the toms present in BCC unit cell is
The fraction of volume occupied by atoms in a face centered cubic unit cell is:
The fraction of volume occupied by atoms in a body centered cubic unit cell is:
Calculate the void space in a primitive unit cell and also the fraction of the total volume occupied .
