CERIUM EXTRACTION FROM RARE EARTH CONCENTRATES BY ELECTROCHEMICAL AND EXTRACTION METHODS FOR PREPARATION OF POLISHING MATERIALS

O.V.Yurasova , T.A. Kharlamova, S.A.Vasilenko , T.V.Fedulova , A.A.Gasanov , T.V.Dobrynina , O.Yu.Saykina , A.F.Alaferdov , V.V.Apanasenko