Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are : (1) 12, 6 (2) 8, 4 (3) 6, 12 (4) 2, 1
Option 1) A hexagonal primitive unit cell contains 6 atoms in the crystal structure i.e. n = 6 We know that, for hcp, The number of octahedral voids will be equal to the number of atoms in the crystal structure. No. of octahedral voids = 6. The number of tetrahedral voids will be equal to two times the number of atoms in the crystal structure . No. of tetrahedral voids = 2 x 6 = 12.
