Identify the correct match(es) between the limiting radius ratio range () and the corresponding ideal geometric arrangement (and coordination number) in an ionic solid:

Question

Identify the correct match(es) between the limiting radius ratio range ($\frac{r_+}{r_-}$) and the corresponding ideal geometric arrangement (and coordination number) in an ionic solid:

Prashant Kotian · Accepted Answer

Correct answer: A,B,C,D. All matches are geometrically derived rules for ionic crystal stability. A cation will fit into a triangular, tetrahedral, octahedral, or cubic void based strictly on these specific bounding ratios before forcing the anions apart.

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