RARE EARTH COMPOUNDS ANDERSON LATTICE THEORY 2 ANTIFERROMAGNETIC MATERIALS 2 FERMI LEVEL 2 Intermediate-valence effects on the phase diagram of NiS2_Xsex 2 KONDO EFFECT 2 MAGNETIC RE-ENTRANCE 2 Magnetic re-entrance in intermediate valence compounds 2 PHASE DIAGRAMS 2 PHYSICAL PROPERTIES 2 VALENCY MODEL 2 VALENCY STATES 2 CRYSTAL FIELD 1 INHOMOGENEOUS FIELDS 1 Interacción spin-red en iones de tierras raras con estado fundamental caso Γ8 1 SPECTROSCOPY 1 SPIN-LATTICE 1 ZEEMAN EFFECT 1