A compound forms a hexagonal close-packed (hcp) structure. What is the number of (i) octahedral voids (ii) tetrahedral voids (iii) total voids formed in 0.4 mol of it?
a) Octahedral voids: 0.8 mol, Tetrahedral voids: 0.4 mol, Total voids: 1.2 mol
b) Octahedral voids: 0.4 mol, Tetrahedral voids: 0.8 mol, Total voids: 1.2 mol
c) Octahedral voids: 0.4 mol, Tetrahedral voids: 0.4 mol, Total voids: 0.8 mol
d) Octahedral voids: 0.8 mol, Tetrahedral voids: 0.8 mol, Total voids: 1.6 mol