The density of \( \mathrm{CaF}_{2} \) (fluorite structure) is \( 3....

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The density of \( \mathrm{CaF}_{2} \) (fluorite structure) is \( 3.18 \mathrm{~g} / \mathrm{cm}^{3} \). The length of the side of the unit cell is :-
\( \mathrm{P} \)
(A) \( 253 \mathrm{pm} \)
(B) \( 344 \mathrm{pm} \)
(C) \( 546 \mathrm{pm} \)
(D) \( 273 \mathrm{pm} \)
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