In situ high temperature NMR and EXAFS experiments in rare-earth fluoride molten salts

Local Structure Analogy of Lanthanide Fluoride Molten Salts

“…The high temperature 139 La NMR spectra have also been recorded for LaF 3 -LiF melts [15]. It was not possible to record an NMR Lu spectrum because of its very high quadrupolar coupling constant (c q = 350 × 10 −30 m 2 , whereas for 139 La, c q = 20 × 10 −30 m 2 ).…”

“…Preliminary results have been published on the lanthanum system to present the suitability of the cell we have designed specifically for EXAFS studies of molten fluorides [15,16].…”

“…They are indeed highly corrosive and volatile, and the melting temperatures are high (700-1800 K). Most of the previous work deals with the electrochemical [8,9] and thermodynamic properties [10,11] and very few spectroscopic studies [12][13][14][15] have been done. The latter are important to provide coordination numbers and interatomic distances and are helpful for electrochemical experiment analysis and for building potentials in numerical simulations.…”

NMR parameters in alkali, alkaline earth and rare earth fluorides from first principle calculations

“…Unfortunately, there are some discrepancies between the 19 F δ iso values previously reported for these compounds. 1,[4][5][6]30,64,[93][94][95][96][97][98][99][100][101][102] In addition, these values are referenced relative to different fluorine standard (CFCl 3 , C 6 F 6 ) and thus need to be expressed with respect to CFCl 3 , the primary fluorine standard. Such conversion procedure was used in previous works 26,56 (some experimental values seem erroneously converted in the paper of Zheng et al 56 .…”

Zero‐Direct‐Carbon‐Emission Aluminum Production by Solid Oxide Membrane‐Based Electrolysis Process

“…Molten fluorides have distinctive physical and chemical properties that make them perfect candidates for the SOM process [21]. These include high thermal conductivity and capacity, moderate viscosity, high electrical conductivity, mutual miscibility, thermochemical and electrochemical stability, low dielectric constants and good solvency [22]. Fluoride-based fluxes have been successfully used in the production of metals using SOM electrolysis.…”