Question

What Are Octahedral Voids In FCC

Answer 1

Answer:

Such voids in an fcc unit cell in which if we place an atom it would be in contact with six spheres at equal distance (in the form of an octahedron) are called octahedral voids

Explanation:

Answer 2

Since there are 12 edges, Total number of voids from edges is 3. Also, There is an octahedral void at the very center of the fcc lattice. This is totally inisde the lattice. Hence, total number of octahedral voids in an fcc are 4.