| abstract |
A method for producing rare-earth element sulfides by reacting a rare-earth element compound with hydrogen sulfide, which is because in order to increase the purity of products and reduce the number of operations in the semi-monosulfide, tetrahydrofuranic taps are used with hydrogen sulfide, and I will be able to work with tetrahydrofuran motifs I-troughs I and I, and I will be able to use tetrahydrofuran motifs I tsfs to reduce the number of operations with mono-sulfides. |