. The entire cell is completelyfill

. The entire cell is completely
filled with molten LiCl–KCl electrolyte with an additional liquid metal
pool occupying its bottom. A variety of liquid metals (Me¼Al [1], Bi
[3] or Cd [3]) have been explored to extract the rare earth (RE)
elements (light rare earth elements between La and Gd with the
exception of Pm), which are partially oxidized, from the electrolyte.