define the term radius ratio ?
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Define radius ratio. ... It is the ratio of the radius of the cation to the radius of the anion in an ionic crystal. the radius ratio of tetahedral is in between 0.225-0.732. Its ideal value is 0.225 for tetrahedral void.
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The ratio of the radius of the smaller ion to that of the larger; commonly cation to anion. Radius ratios are used to predict coordination numbers of anions about cations in ionic crystal structures.
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