Q. For $AX\$ ionic crystal to exist in bcc structure, the ratio of radii $\left( \frac{r_{cation}}{r_{anions}} \right)$ should be
A) Between 0.41 and 0.73
B) Greater then 0.73
C) Less than 0.41
D) Equal to 1.0
Explanation
(b)
For body centred cubic (bcc) structure, the ratio of radii ($r_{+}/r_{-}$) lies in between 0.732$-$1.00.
$\therefore$ The ratio of radii for bcc is greater than 0.73.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.