The ionic radii of `A^(+) and B^(-)` ions are `0.98 xx 10^(-10) and 1.81 xx 10^(-10) m` .The coordinatyion number of each ion in `AB` is

Options

A. 6
B. 4
C. 8
D. 2

Answer

A

Explanation

Radius ratio of ` (A^(+) )/(A^(-)) = (0.98 xx 10^(-10) m)/(1.81 xx 10^(-10) m) = 0.541 `
if the radius ratio is in between 0.414 and 0.732 then coordination is 6