What is the value of radius ratio of ionic crystal having coordination number six?
What is the value of radius ratio of ionic crystal having coordination number six?
Greater than $0.732$
In between $0.414$ to $0.732$
In between $0 \cdot 225$ to $0 \cdot 414$
Less than $0.225$
Solution
Correct answer is in between $0.414$ and $0.732$
Since the general formula is $\mathrm{AX}$ with coordination number 6 , the crystal could be considered as $\mathrm{NaCl}$. Thus, it is evident that the ratio lies between $0.414$ and $0.732$ because of its octahedral structure.
The value ranging between $0.414$ and $0.732$ is obtained by dividing the radius of positive ion by that of negative ion.