In calcium fluoride structure, the coordination numbers of calcium and fluoride ions are, respective — Solid State Chemistry Question
Question
In calcium fluoride structure, the coordination numbers of calcium and fluoride ions are, respectively,
Answer: A
💡 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.
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