2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/170919We argue that the Jahn-Teller theorem, if applied to 3d-ion compounds, has to be considered in the orbital+spin space. It is despite of the weakness of the intraatomic spin-orbit coupling.3 pages in RevTex, no figureStrongly Correlated Electronstext