Improvement of Single-Crystal Structures of Very Heavy Element Compounds by Refining Anomalous Dispersion Parameters.

ABSTRACT: Refining the anomalous dispersion parameters of the four uranium compounds NaUF₅, NaU₂F₉, Cs₂(UO₂)TiO₄, and Cs₂(UO₂)Ti₂O₆ gave insights into the crystallographic model improvement of very heavy atoms. We found that the values for the dispersive and absorptive parts, f' and f″, closely followed the X-ray absorption spectra on their L₃, L₂, and L₁ edges. The obtained values are sensitive to the chemical environment at each crystallographically independent position. An incorrect treatment of the anomalous dispersion correction can lead to a wrong crystallographic model. The above-mentioned, already published structures were improved by th

SUBMITTER: Meurer F 

PROVIDER: S-EPMC11351177 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature