Structural characterization and chemistry of LiF-AlF3 melts with addition of MgO and MgF2

The LiF-AlF3 system with additions of MgO and MgF2 has been studied by O-17, Mg-25, Al-27 and F-19 in-situ high temperature NMR, ex-situ solid state NMR and X-ray powder diffraction for a wide range of compositions. The description of the speciation in the melts and its evolution with different operational parameters such as temperature, time and composition were obtained for MgF2/MgO-(1-x)LiF-xAlF(3) for x = 14.5, 25 and 35.5 mol% systems. The evolution of the signals provides evidence of a chemical reaction between the MgO and the salt.

Automated summary

The LiF-AlF3 system with additions of MgO and MgF2 was investigated using O-17, Mg-25, Al-27 and F-19 in-situ high temperature NMR techniques. The study found evidence of a chemical reaction between MgO and the salt in the melts, providing insight into the speciation and evolution of the system.