In a close packed structure, there are M- spheres, how many octahedral voids are associated with them ?

In a close packed structure there are N- spheres, how many tetrahedral voids are associated with them ?

In a close packed structure, there are P- spheres, how many voids (total) are associated with them

How many sub-shells are associated with n = 4 ?

In a hexagonal close packed (hcp) structure of spheres, the fraction of the volume occupied by the sphere is A. In a cubic close packed structure the fraction is B. The relation for A and B is:

In a cubic close packed structure of mixed oxides, the lattice is made up of oxide ions, one eigth of the tetrahedral voids are occupied by divalent ions (A^(2+)) while one half of octrahedral voids are occupied by trivalent ions (B^(3+)) . What is the formula of the oxide?

Position of octahedral voids in fcc structure is//are

In the spinel structur, oxides ions are cubical-closet packed whereas 1/8th of tetrahedral voids are occupied by A^(2+) cation and 1/2 of octahedral voids are occupied by B^(+) cations. The general formula of the compound having spinel structure is: