If the pressure on a $NaCl$ structure is increased,then its coordination number will

The vacant space in the $bcc$ unit cell is .............. $\%$

By increasing the pressure on $NaCl$ crystal,its coordination number will

$Zn$ transforms from its solid state to its molten state. What is its coordination number in the molten state?

$A$ compound formed by elements $X$ and $Y$ crystallises in a cubic structure, where $X$ atoms are at the corners of a cube and $Y$ atoms are at the body centre. The formula of the compound is:

An ionic compound is expected to have a tetrahedral structure if the radius ratio $r_{+} / r_{-}$ lies in the range of: