155Gd Mössbauer spectra of some Gd(III)-b-diketonato complexes

Abstract

155Gd Mossbauer spectra of some Gd(III)-b-diketonato complexes are reported. All of their 155Gd Mossbauer isomer shift (d) values fall in a narrow range of +0.55-+0.65 mm.s-1, and are between those of GdF3 and the cubic form of Gd2O3. This indicates that their Gd-O bonds have small covalent character. The value for quadrupole coupling constant (e2qQ) spread out from 1.67 to 7.56 mm.s-1 and reflects the difference well in symmetry of the coordination polyhedron around Gd(III) ions for those Gd(III)-b-diketonato complexes.