Question

1 mole silver atoms present in ffc arrangement find the number of total voids in this crystal in mole​

Answer 1

since there are 12 edges, total number of voids from edge is 3 Also there is an octahedral void at the every centre of fcc lattice. this is totally inside the lattice. hence total number of octahedral voids in fcc are 4,then the tetrahedral voids are =2n therefore n=4 ,then tetrahedral voids are 8 (octahedral voids =n)