The ratio of cationic radius to anionic radius in an ionic crystal is greater than $0.732$. Its coordination number is

Explain the calculation of the number of atoms in a body-centered cubic $(bcc)$ unit cell.

Predict the close-packed structure of an ionic compound $A^{+} B^{-}$ in which the radius of cation and anion are $148 \ pm$ and $195 \ pm$ respectively.

The coordination number of the point $B$ for a solid with the following structure is:

In the fluorite structure,the coordination number of the $Ca^{2+}$ ion is.....

The coordination number of $Na^{+}$ in $NaCl$ is