Question

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

• A. 8,4
• B. 6,12
• C. 2,1
• D. 12,6

Answer 1

Answer: (D)

12,6

Answer 2

Number of tetrahedral voids $= 2N$ Number of octahedral voids $= N$ $N =$ effective atoms for Hexagonal effective atoms $=6$ Tetrahedral voids $=2 \times 6=12$ Octahedral voids $=6$