The ionic radii of Rb and I are 1.46 and 2.16 Å, respectively. The most probable type of structure e — Solid State Chemistry Question

💡 Solution & Explanation

Radius ratio $r_+ / r_- = 1.46 / 2.16 \approx 0.676$. This value lies between 0.414 and 0.732, indicating that the cation occupies an octahedral void, typical of the NaCl type structure. Therefore, correct answer is B.