2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/153173The stability of metallic clusters of sodium (Na) in the octahedral cages of Na-doped fullerites Na6C60 and Na11C60 is discussed within a Thomas-Fermi model. It is shown that the tetrahedral Na4-cluster in Na6C60 has an electric charge of cca. +2.7 (in electron charge units), while the body-centered cubic Na9-cluster in Na11C60 is almost electrically neutral.10 pages, no figures, latex, J. Theor. Phys., to appearMaterials Sciencetext