Before revision: Substitutional solid solution rules For substitutional solid solutions, the Hume-Rothery rules are as follows: The atomic radius of the solute and solvent atoms must differ by no more than 15%: The crystal structures of solute and solvent must be similar.
After revision: Substitutional solid solution rules For substitutional solid solutions, the Hume-Rothery rules are as follows: The atomic diameter of the solute and solvent atoms must differ by no more than 15%: The crystal structures of solute and solvent must be similar.