In an FCC arrangement of metallic atoms, what is the relative ratio of the sizes of tetrahedral and — Solid State Chemistry Question

💡 Solution & Explanation

The ideal radius for a tetrahedral void is $r_t = 0.225R$ and for an octahedral void is $r_o = 0.414R$, where $R$ is the radius of the sphere. The ratio of their sizes is $r_t / r_o = 0.225 / 0.414 \approx 0.543$. Therefore, correct answer is A.