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机译:Separation of Rare-Earth Elements and Thorium in Sorption Conversion of Phosphate Rare-Earth Concentrate Produced in Nitric Acid Processing of Khibiny Apatite Concentrate
Russian Acad Sci, Tananaev Inst Chem & Technol Rare Elements & Mine, Kola Sci Ctr, Akademgorodok 26a, Apatity 184209, Russia;