Question

For tetrahedral co-ordination the radius ratio
$\left(r^{+}/r^{-}\right)$ should be -

• A. $0.414-0.732$
• B. $>0.732$
• C. $0.156-0.225$
• D. $0.225-0.414$

Answer 1

Answer: (D)

For tetrahedral voids radius ratio is: $r^{+}/r^{-}=0.225-0.414$