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प्रश्न
In an ionic crystal, the radius ratio is greater than 0.732. What is the coordination number of the crystal?
लघु उत्तर
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उत्तर
If the radius ratio `((r_+)/(r_-))` in an ionic crystal is greater than 0.732, it means the cation is relatively large and can fit into a void surrounded by eight anions.
This corresponds to a cubic geometry where the coordinate number = 8.
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