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\( \mathrm{KF} \) crystallizes in the \( \mathrm{NaCl} \) type structure. If the radius of \( \mathrm{K}^{+} \)ion is \( \frac{186}{\sqrt{2}} \mathrm{pm} \) and \( \mathrm{F}^{-} \)ion is \( \frac{214}{\sqrt{2}} \mathrm{pm} \), then what is the shortest distance between \( \mathrm{K}^{+}-\mathrm{K}^{+} \) ions (in \( \AA \) )?
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