Insight into the Crystalline Structure of ThF 4 with the Combined Use of Neutron Diffraction, 19 F Magic-Angle Spinning-NMR, and Density Functional Theory Calculations - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Article Dans Une Revue Inorganic Chemistry Année : 2018

Insight into the Crystalline Structure of ThF 4 with the Combined Use of Neutron Diffraction, 19 F Magic-Angle Spinning-NMR, and Density Functional Theory Calculations

Monique Body
Emmanuelle Suard

Résumé

Because of its sensitivity to the atomic scale environment, solid-state NMR offers new perspectives in terms of structural characterization, especially when applied jointly with first-principles calculations. Particularly, challenging is the study of actinide-based materials because of the electronic complexity of the actinide cations and to the hazards due to their radioactivity. Consequently, very few studies have been published in this subfield. In the present paper, we report a joint experimental–theoretical analysis of thorium tetrafluoride, ThF4, containing a closed-shell actinide (5f0) cation. Its crystalline structure has been revisited in the present work using powder neutron diffraction experiments. The 19F NMR parameters of the seven F crystallographic sites have been modeled using an empirical superposition model, periodic first-principles calculations, and a cluster-based all-electron approach. On the basis of the atomic position optimized structure, a complete and unambiguous assignment of the 19F NMR resonances to the F sites has been obtained.

Domaines

Matériaux

Dates et versions

cea-01942195 , version 1 (03-12-2018)

Identifiants

Citer

Laura Martel, Elisa Capelli, Monique Body, Marco Klipfel, Ondrej Beneš, et al.. Insight into the Crystalline Structure of ThF 4 with the Combined Use of Neutron Diffraction, 19 F Magic-Angle Spinning-NMR, and Density Functional Theory Calculations. Inorganic Chemistry, 2018, 57 (24), pp.15350-15360. ⟨10.1021/acs.inorgchem.8b02683⟩. ⟨cea-01942195⟩
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