Local Structure Analogy of Lanthanide Fluoride Molten Salts

The objective of this paper is to describe the local structure of lanthanide fluoride melts of nuclear iInterest. An experimental approach combining NMR and EXAFS spectroscopy, both sensitive to the microstructure of solid or liquid materials, is preseInted. These techniques can be used to determine the coordination number, the nature of neighbors, and then to identify the complex formation. NMR and EXAFS spectroscopy have been applied to the molten LaF3–LiF and LuF3–LiF systems. The influence of melt compositions and temperature was studied.