The edge length of the unit cell of \( \mathrm{KCl} \) ( \( \mathrm...

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The edge length of the unit cell of \( \mathrm{KCl} \) ( \( \mathrm{NaCl} \) like structure ; fcc) is \( 6.28 \AA \). Assuming anion-cation contact along the cell edge, calculate the radius of the potassium ion. \( \left(\mathrm{r}_{\mathrm{Cl}^{-}}=1.8173 \AA\right) \).
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