Ionic radius of \( \mathrm{A}^{+} \)and \( \mathrm{B}^{-} \)are \( 102 \mathrm{pm} \) and \( 181...

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Ionic radius of \( \mathrm{A}^{+} \)and \( \mathrm{B}^{-} \)are \( 102 \mathrm{pm} \) and \( 181 \mathrm{pm} \) respectively forming a ccp structure. If \( \mathrm{B} \) forms a ccp lattice and \( \mathrm{A}^{+} \)fills the octahedral vids, then what is the value of edge length in \( \mathrm{pm} \) ?
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