The Ca²⁺ and F^– are located in CaF₂ crystal, respectively are at face centred cubic lattice points and in

The ${\mathrm{Ca}}^{2+}$and ${\mathrm{F}}^{-}$ are located in ${\mathrm{CaF}}_2$crystal respectively at face-centred cubic lattice points and in tetrahedral voids. The calcium fluoride structure is also called fluorite structure. It is 8: 4 arrangement, the coordination number of ${\mathrm{Ca}}^{2+}$and ${\mathrm{F}}^{-}$ions is 8 and 4 ions respectively.