Here, A corresponds to the migration ion, X to the counter ion of the host lattice, r A and n X are their ionic radii, n A and n X the absolute values of the formal integer oxidation states, and χ A and χ X their electronegativities. By plotting calculated migration barriers as a function of this migration number, both for the variation of the migrating ion A and the counter ion X, linear scaling relations are observed . This basically confirms the fact that in order to fully understand the migration mechanism, the deviation from a purely ionic interaction in a crystal structure must be taken into account . Based on this descriptor and through computational analysis, a novel oxide spinel framework was characterized and predicted to exhibit high Mg conductivity .