In an ionic crystal,$\frac{r^{+}}{r^{-}} = 0.524$,the coordination number of the cation is:

For an ionic crystal of the type $AB$,the value of the limiting radius ratio is $0.40$. This value suggests that the crystal structure should be:

The number of octahedral voids in a $BCC$ structure is:

The fraction of void space on the body diagonal in an ideal rock salt structure is [Use : $\sqrt{6} = 2.45$]

In a cubic crystal structure,'$W$' atoms are at the corners of the cube,'$O$' atoms are at the edges,and '$Na$' atoms are at the body center. Determine the formula of this crystal.

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