What is the coordination number of a cation in an ionic compound if the type of hole occupied by the cation is cubic?

The number of hexagonal faces that are present in a truncated octahedron is

The mineral $ZnAl_2O_4$ has a spinel structure. The percentage of occupied octahedral voids is ........... $\%$.

If $AB$ crystallizes in a zinc blende structure with $B^{-}$ ions at lattice points,what fraction of tetrahedral voids is occupied by $A^{+}$ ions? (Express as a percentage)

What is the coordination number of $Zn$ in the crystal structure of $Zn$?

The edge length of a face-centred cubic unit cell is $508 \ pm$. If the radius of the cation is $110 \ pm$, the radius of the anion is .............. $pm$.