Question

For an ionic crystal of the general formula $AX$ and coordination number 6, the value of radius ratio will be.

• A. Greater than 0.73
• B. In between 0.73 and 0.41
• C. In between 0.41 and 0.22
• D. Less than 0.22

Answer 1

Answer: (B)

In between 0.73 and 0.41

Answer 2

The structural arrangement of co-ordination number ‘6’ is octahedral and its radius ratio is $0.414 - 0.732$. The example of octahedral is $KCl$ and $NaCl$.