BornBorn model used a statistical model where the energy of interaction between ions and the surrounding solvent was approximated by the energy needed to charge ions modeled by spherical charge distributions in a dielectric solvent with its known dielectricPermittivity permittivity. He assigned crystallographic radii to the ions and found the predicted solvation energies from groups ion the periodic table were made more accurate by adding 0.10 Å to the anion radii and 0.85 Å to the cation radii. This introduced semiempirical parameterization in electrochemistry.