In the Fluorite () structure, the coordination numbers of the and ions are respectively: — Solid State Chemistry Question
Question
In the Fluorite ($CaF_2$) structure, the coordination numbers of the $Ca^{2+}$ and $F^-$ ions are respectively:
Answer: B
💡 Solution & Explanation
In fluorite, $Ca^{2+}$ ions form an FCC arrangement and $F^-$ ions occupy all tetrahedral voids. Each $Ca^{2+}$ is surrounded by $8$ fluoride ions, while each $F^-$ is surrounded by $4$ calcium ions.
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