All of the following share the same crystal structure except:

The number of spheres contained $(i)$ in one body centred cubic unit cell and $(ii)$ in one face centred cubic unit cell,is

The radius of the calcium ion is $94 \text{ pm}$ and the radius of the oxide ion is $146 \text{ pm}$. What is the possible crystal structure of calcium oxide?

$A$ unit cell of calcium fluoride has four calcium ions. The number of fluoride ions in the unit cell is

The ratio of the number of atoms present in a simple cubic,body-centered cubic,and face-centered cubic unit cell is,respectively:

An example of fluorite structure is