Right option for the number oof tetrahedral and octahedral voids in hexagonal primitive unit cell are:

Options

A. 6,12
B. 2,1
C. 12,6
D. 8,4

Answer

C

Explanation

No. of atoms in hexagonal primitive unit cell = 6
No. of tetrahedral voids = `2 x×` No. of atoms per unit cell
`= 2 xx 6`
`= 12`
No. of octahedral voids = No. of atoms per unit cell = 6,