The unit cell of a $NaCl$ lattice:

Determine the number of atoms per unit cell in a body-centered cubic $(BCC)$ unit cell.

In an ${A^{+}}{B^{-}}$ ionic compound, the radii of ${A^{+}}$ and ${B^{-}}$ ions are $180 \ pm$ and $187 \ pm$ respectively. The crystal structure of this compound will be:

What is the coordination number of a cation present in a tetrahedral void?

The crystal structure of $AB$ is of $NaCl$ type. If the radius of the $A^+$ ion is $x \ pm$ and the radius of the $B^-$ ion is $y \ pm$, then the edge length of the unit cell will be ..........

If the radius of an anion is double that of a cation,the coordination number of the cation and the type of hole occupied are respectively: