Question

For tetrahedral coordination number, the radius ratio $\frac{r_{c^{+}}}{r_{a^{-}}}$ is.

• A. $0.732 - 1.000$
• B. $0.414 - 0.732$
• C. $0.225 - 0.414$
• D. $0.155 - 0.225$

Answer 1

Answer: (C)

$0.225 - 0.414$

Answer 2

For tetrahedral arrangement co-ordination number is 4 and radius ratio $(r_{+}/r_{-})$ is $0.225 - 0.414$.