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Br^(-) ions form close packed structure....

`Br^(-)` ions form close packed structure. If the radius of `Br^(-)` ion is 195 p, calculate the radius of the cation that just fits in the tetrahedral hole. Can a cation `A^(+)` having a radius of 82 pm be slipped into the octahedral hole of the crystal `A^(+) Br^(-)`?

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To solve the problem, we need to follow these steps: ### Step 1: Calculate the radius of the cation that fits in the tetrahedral hole. Given: - Radius of `Br^(-)` ion (anion) = 195 pm - The ratio of the radius of the cation to the radius of the anion for tetrahedral voids is approximately 0.414. Using the formula: ...
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