In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion (Ca²⁺) and fluoride ion (F⁻) are

19 2016 Phase II The Solid StateIonic crystal structures – fluorite Easy
In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion ($Ca^{2+}$) and fluoride ion ($F^-$) are
A 8 and 4
B 4 and 8
C 4 and 2
D 6 and 4

Explanation

Fluorite: Ca²⁺ (8) and F⁻ (4).

Detailed Solution

In $CaF_2$, the coordination number of $Ca^{2+}$ = 8 and of $F^-$ = 4.

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