For an ionic crystal of the formula `AX` and cooradition number `6`, the value of radius ratio will be

Options

A. greater than `0.73`
B. between `0.73` and `0.41`
C. between `0.41` and `0.22`
D. less than `0.22`

Answer

B

Explanation

For C.N 6, the `r^(+)//r^(-)` lies between `0.73` and `0.41`