Samarium compounds band structure

The nature of 4f electrons in lanthanides and their compounds, either localized or itinerant, is responsible for most of their physical and chemical properties. Localized states corresponding to tightly bound electron shells or to narrow bands of correlated electrons near the Fermi level are observed for all lanthanides. Pressure has a striking effect on the electronic structure, which, in turn, induces structural changes. For instance, crystal structure transitions from hexagonal closed packed (hep) samarium type double... 

The corresponding samarium, holmium and erbium complexes have been made in the same way by Tsutsui and Ely (1975b), which show also an IR band at 1533 cm" for the delocalized allyl stretching vibration. But the complete structure of these compound is not clear. Additional bands in the optical spectra of the tetrahydro-... 

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