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In CaF(2) crystal, Ca^(2+) ions are pres...

In `CaF_(2)` crystal, `Ca^(2+)` ions are present in arrangement . Calculate the number of `F^(-)` ions in the unit cell.

Text Solution

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No. of `Ca^(2+)` ions per unit cell
`= 8 xx ( 1)/( 8) + 6 xx ( 1)/( 2)`
`= 1+ 3 = 4`
Hence No. of `F^(-)` ions per unit cell = `2 xx 4 = 8`
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