Question

In a closed packed array of N sphere ,how many octahedral and tetrahedral voids are present​

Answer 1

Answer:

In a closed packed array of N spheres, the number of tetrahedral holes is 2N and the number of octahedral holes is N. For example, fcc unit cell has 4 atoms per unit cell. It has 4 octahedral and 8 tetrahedral voids.