The correct coordination number for the zinc ion in the zinc blende crystal structure is:

What is the coordination number of the $Ca^{2+}$ ion in the fluorite structure?

For tetrahedral coordination number,the radius ratio $\frac{r_{c^+}}{r_{a^-}}$ is

The face diagonal length of $f.c.c.$ cubic cell is $660 \sqrt{2} \, pm$. If the radius of the cation is $110 \, pm$,the radius of the anion is ............ $pm$.

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

The empirical formula for a compound with a cubic close packed arrangement of anions and with cations occupying all the octahedral sites is $A_{x}B$. The value of $x$ is ..... .
(Integer answer)