Question

If $r_{+}/r_{-}$ lies between 0.414 to $0.732,$ the cation will occupy

• A. trigonal void
• B. tetrahedral void
• C. octahedral void
• D. cubic void.

Answer 1

Answer: (C)

Radius ratio $=\frac{\text{ radius of the cation }\left(r_{+}\right)}{\text{radius of the anion }\left(r_{-}\right)}$

If radius ratio lies in the range of $0.414-0.732,$ its coordination number will be 6 and the cation will occupy the octahedral void.