Question

In Calcium fluoride structure $\left(Ca{F}_2\right)$:

• A. $C{a}^{++}$ ions are in cubic & $F^{-}$ ions are present in the tetrahedral voids
• B. $C{a}^{++}$ ions are in cubic & $F^{-}$ ions are present in the octahedral voids
• C. $C{a}^{++}$ ions are cep & $F^{-}$ ions are present in half the octahedral voids and half the tetrahedral voids
• D. none of the above

Answer 1

The correct option is A $C{a}^{++}$ ions are in cubic & $F^{-}$ ions are present in the tetrahedral voids

In $Ca{F}_2$ structure also known as fluorite structure.

$C{a}^{+2}$ forms FCC lattice.

$F^{-}$ occupies all tetrahedral voids.