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What is the C.N of Ca^(2+) and F^(-) ion...

What is the C.N of `Ca^(2+)` and `F^(-)` ions in `CaF_(2)` crystal lattice ?

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C.N of `Ca^(2+)` ion = 8 , CN of `F^(-)` ion = 4.
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DINESH PUBLICATION-SOLID STATE-QUESTION FROM BOARD EXAMINATION
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