SOLUTIONS OF RARE EARTH HALIDES IN ORGANIC SOLVENTS AND METHODS FOR THE PRODUCTION AND USE THEREOF

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The present invention relates to magnesium-salt-containing rare earth halide solutions in aprotic polar organic solvents, methods for the production thereof and the use thereof. Solutions of rare earth metal halides SEHah and magnesium salts MA2 of monovalent acids HA in an aprotic organic solvent or solvent mixture are claimed, wherein SE is selected from the group consisting of : Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu and A is selected from the group consisting of : carboxylates, alkoxides, phenoxides, pseudohalides, sulfonates, nitrate, nitrite, perchlorate, chlorate, chloride, bromide, iodide.