Question

In. A+B- Ionic compound radii od A+ and B- ions are 180 pm and 187 pm the crystal structure of this compound will be
(a) NaCl type
(b) CsCl type
(c) ZnS type
(d) similar to diamond

Answer 1

It will have a cubical structure since the radius ratio is 0.96I.e the radius ratio = radius of cation/radius of anion=180/187=0.96 which belongs to cubical structure