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A solid A^(+) B^(-) has NaCl type close...

A solid `A^(+) B^(-)` has NaCl type close packed structure. If the anion has a radius of 241.5 pm, what should be the idealradius of the cation? Can a cation `C^(+)` having radius of 50 pm be fitted into tetrahedral hole of the crystal `A^(+)B^(-1)`?

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The correct Answer is:
99.98 pm
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