Gaseous StateEasy
Question
If Z is the number of atoms in the unit cell that represents the closest packing sequence..... ABC ABC ......, the number of tetrahedral voids in the unit cell is equal to :
Options
A.Z
B.2Z
C.Z/2
D.Z/4
Solution
In cubic closed pack system (CCP system).......ABCABC....... type of arrengement oflayers is found. In this system, there are atoms at the corners as well as center of the unit cell.
∴ No. of atoms per unit cell = 8 ×
+ 1 = 2
Hence, the no. of tertrahedral voids in a unit cell = 2Z
∴ No. of atoms per unit cell = 8 ×
+ 1 = 2Hence, the no. of tertrahedral voids in a unit cell = 2Z
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