In calcium fluoride structure, the coordination numbers of calcium and fluoride ions are, respective — Solid State Chemistry Question

💡 Solution & Explanation

In the fluorite (CaF$_2$) structure, Ca$^{2+}$ ions form a CCP lattice and F$^-$ ions occupy all tetrahedral voids. Thus, each Ca$^{2+}$ is coordinated by 8 F$^-$ ions, and each F$^-$ is coordinated by 4 Ca$^{2+}$ ions. Therefore, correct answer is A.