# In closest packing of A type of atoms (radius, rA), the radius of atom B that can be fitted into Octahedral void is

Q: In closest packing of A type of atoms (radius, rA), the radius of atom B that can be fitted into Octahedral void is

(A) 0.155 r

(B) 0.125 rA

(C) 0.414 rA

(D) 0.732 rA

Solution: For octahedral void

$\large \frac{r_B}{r_A} = 0.414$

or,  rB = 0.414 rA

Ans: (C)