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Ion solvation and association and water structure in an aqueous cerium (III) chloride solution in the gigapascal pressure range
Ist Teil von
Analytical sciences, 2022-02, Vol.38 (2), p.409
Ort / Verlag
Switzerland
Erscheinungsjahr
2022
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
X-ray diffraction measurements are performed on a 1 m (= mol kg
) CeCl
aqueous solution over a temperature range of 300-600 K and a pressure range of 0.1 MPa to 4 GPa. The experimental interference functions are analyzed by an empirical potential structure refinement (EPSR) modeling. The Ce
coordinates water molecules in a tricapped trigonal prism configuration under the ambient condition. The number of water molecules around Ce
changes from 8.8 at 0.1 MPa/300 K to 11.5 at 4 GPa/600 K. The number of water molecules around Cl
changes drastically from 10 under the ambient condition to 17 at 4 GPa/600 K. The tetrahedral-like network structure of water under the ambient condition is transformed toward a simple liquid-like packing in the GPa pressure range. The corresponding coordination number is increased from 4.3 in the ambient condition to 9.7 at 4 GPa/600 K. The Ce
-Cl
association decreases with increasing pressure.
Sprache
Englisch
Identifikatoren
eISSN: 1348-2246
Titel-ID: cdi_pubmed_primary_35314988
Format
–
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