What minimum r+/r- ratio is needed to avoid anion-anion contact, if closest cation-anion pairs are a — Solid State Chemistry Question
Question
What minimum r+/r- ratio is needed to avoid anion-anion contact, if closest cation-anion pairs are assumed to touch?
Answer: B
💡 Solution & Explanation
The minimum radius ratio (r_cation / r_anion) required to fit a cation into a tetrahedral void without causing anion-anion contact is the tetrahedral limit, which is 0.225.
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