Optical spectra and Zeeman effect of rare earth carboxylates and their correlation with crystal structure. Spectra of trisodiumeuropiumtris-(oxydiacetate) di(sodium perchlorate) hexahydrate

Abstract

Transitions ⁷F₀→⁵D_J(J= 1,2,3,4) and ⁷F_Jâ†�⁵D₀(J= 1,2) of Eu³⁺ in Na₃Eu (C₄H₄O₅)₃× 2NaClO₄× 6H₂O (EuDG) have been assigned through spectral and Zeeman effect studies. Apart from establishing the magnetic dipole nature of the ⁷F₀→⁵D₁ and ⁷F₁â†�⁵D₀ transitions, the spectral studies clearly reveal subtle distortions in rare earth site symmetry not revealed by previous X-ray studies on the isomorphous series of crystals.