Question

What is the coordination number of calcium in calcium fluoride

Answer 1

the coordination number of Ca in CaF2
let x be the coordination number of Ca
x+2(-1)=0 [ since valency of F is -1)
x=+2
hence coordination number of Ca in CaF2 is +2

Answer 2

Answer:

The Ca2+ and F− are located in CaF2 crystal respectively at face-centred cubic lattice points and in tetrahedral voids.