Question

In $ABC$ $ABC$ packing if the number of atoms in the unit cell is $n$ then the number of tetrahedral voids in the unit cell is equal to

• A. $n$
• B. $n/2$
• C. $n/4$
• D. $2n$

Answer 1

Answer: (D)

$2n$

Answer 2

Number of tetrahedral voids per atom in a unit cell is $2$. Hence the total number of tetrahedral voids $= 2n$.