InterviewSolution
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InterviewSolution
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In calcium, fluoride having the florite structures. The coordination number for calcium ion `(Ca^(2+))` and fluoride ion `(F^(-))` areA. `4` and `2`B. `6` and `6`C. `8` and `4`D. `4` and `8` |
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Answer» Correct Answer - 3 The `Ca^(2+)` ions are located at the face centred cubic lattice points and therefore have cubic closest packed arrangement .the `F^(-)` ions occupy all the eight tetrahedral voids.Thus the coordination number of `Ca^(2+)` ion (surrounded by eight tetrahedral voids ) is eight while the coordination number of `F^(-)` ion (occupying tetrahedral void) is four. |
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