Question

For AX ionic crystal to exist in bcc structure, the ratio of $\left(\frac{r_{cation}}{r_{anion}}\right)$ should be:

• A. between 0.41 and 0.73
• B. greater than 0.73
• C. less than 0.41
• D. equal to 1.0

Answer 1

Answer: (B)

greater than 0.73

For bcc structure, the radius ratio should be greater than $0.73$ because the radius ratio lies between $0.732$ to $\mathrm{1.00.}$

Hence, option B is correct.