Question

Hexagonal and octahedral are same or different

Answer 1

YA BOTH ARE SAME
The close packing system involves two kinds of voids – tetrahedral voids and octahedral voids. The former has four spheres adjacent to it while the latter has six spheres adjacent to it. These voids are only found in either fcc or Hexagonal Primitive unit cells.
Let us first consider a fcc unit cell (as shown in the figure 8(a).). Not all the atoms of the unit cell are shown (for convenience).
Let us assume that there is an atom (d

Answer 2

Explanation:

hyyyyyyyyy........................