Solid- solid surface adsorption of Eu₂O₃ on amorphous Al₂O₃ have been investigated by Mössbauer spectroscopy, X- ray diffraction analysis and laser Raman spectra (LRS). No X-ray diffraction peak of crystalline Eu₂O₃ can be found for all samples studied. The LRS show that two peaks at 998 and 1051 cm^-1 assigned to two- dimensional surface europium- oxygen species appear at Eu₂O₃ content of 18.7 wt%. The peak at 1068 cm^-1 due to the surface species and another peak at 342 cm^-1 due to crystalline Eu₂O₃ content start to appear for the sample with an Eu₂O₃ content of 36.5 wt%. The dispersity of Eu₂O₃ on the surface of amorphous Al₂O₃ were compared with that of γ - Al₂O₃, η - Al₂O₃ and SiO₂ gel. The results of these studies indicate that the structure of Eu₂O₃ dispersed onto the support surface depend on the structure of support and that there is an inductive effect of support on the structure of the Eu₂O₃.