Source: https://www.researchgate.net/profile/Philippe-Colomban/publication/45818368_RELATION_STRUCTURE-CONDUCTIVITE_IONIQUE_DANS_LES_COMPOSES_DE_TYPE_ALUMINE_b/links/0deec52a16665addd1000000/RELATION-STRUCTURE-CONDUCTIVITE-IONIQUE-DANS-LES-COMPOSES-DE-TYPE-ALUMINE-b.pdf