Unsur tanah jarang/rare earth Unsur lantanida nu nomer atomna ti 57 nepi ka 71 dina tabel periodik, nyaéta lantanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm) Samarium (Sm) , europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), er...
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