Published by:
CGP EDU Academic Team
Published on: August 13, 2026
A compound of formula 
has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms :
A
hcp lattice 
Tetragonal voids 
Tetragonal voids
B
hcp lattice 
Tetragonal voids 
Tetragonal voids
C
hcp lattice 
Tetragonal voids 
Tetragonal voids
D
hcp lattice 
Tetragonal voids 
Tetragonal voids
Text Solution
Verified by ExpertsThe correct answer is:
D
Here, 
can also be written as 
.
Thus, hcp has six atoms so, ‘B’ forms hcp lattice and ‘A’ is present in tetrahedral void.
Total tetrahedral voids 
Fraction of tetrahedral voids occupied by 
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