. The Ca2 and F are located in CaF2 crystal, respectively at body centered cubic lattice points and in

Best Answer

Answer: (a)

Solution: In CaF₂ radius ratio = 0.73

It suggested its crystal structure to be body centered cubic. In this each Ca²⁺ ion is surrounded by eight F^- ions, i.e., co-ordination number is eight and for fluorine it is 4/ In fluorite the Ca²⁺ ions are too small to touch each other, hence the structure is not strictly close packed structure relative positions of Ca²⁺ ions are like ions in a cubic close packed structure in which all the tetrahedral holes are occupied by the F^- ions.