In the closest packing of atoms

In the closet packing of atoms, there are:

For the closest packing of atoms A (radius, r_(A) ), the maximum radius of atom B that can be fitted into octahedral void is

In the closed packing of atoms A ("radius":r_(a)) , the radius of atom B that can be fitted into tetrahedral void is:

In the closest packing of is N atoms . There are

The unit cell present in ABAB, closest packing of atoms is:

In closest packing of A type of atoms (radius r_(A) ) the radius of atom B that can be fitted into octabedral voids is

The unit cell present in ABCABC, closet packing of atoms is:

A unit cell is obtained by closed packing layers of atoms in ABAB …… pattern. The total number of tetrahedral and octahedral voids in the unit cell are respectively

In the closest packed struture of a metallic lattice , the number of mearest neighhours of a metallic atom is

Calculate the void space in closest packing of n spheres of radius 1 unit, n spheres of radiys 0.414 units, and 2n spheres of radius 0.225 units.