The radius of Ag+ ion is 126 pm while that of I- ion is 216 pm. The co-ordination number of Ag in Agl is relatively higher, then its value is

The radius of Ag+ ion is 126pm and of I- ion is 216pm. The coordination number of Ag+ ion is: ρ = rcation / ranion = 126/ 216 = 0.58 Radius ratio lies in the range 0.414 – 0.732, so has coordination number 6 or 4 ,since he said relatively higher it should be 6