In the closest packing of atom A, the radius of atom B that can be fitted into tetrahedral void is 

Options

A. `r_(B)=0.155r_(A)`
B. `r_(B)=0.225r_(A)`
C. `r_(B)=0.414r_(A)`
D. `r_(B)=0.732r_(A)`

Answer

B

Explanation

The atom that can be fitted in to the tetrahedral void is cation. The limiting radius ratio for tetrahedral `r_( c)/r_(a) = 0.225, r_( C) = 0.225 xx r_(a): r_(B) = 0.225 xx r_(A)`