Xyoo 1787, ib tug Swedish lub npe hu ua CA Arrhenius pom ib qho txawv txawv xim dub nyob hauv lub nroog Ytterby ze Stockholm. Xyoo 1794, ib tug neeg Finnish hu ua J. Gadolin cais cov khoom tshiab los ntawm nws. Peb xyoos tom qab ntawd (1797), Swedish AG Ekeberg tau lees paub qhov kev tshawb pom no thiab hu ua cov khoom tshiab yttria (yttrium ntiaj teb) tom qab qhov chaw uas nws tau pom. Tom qab ntawd, hauv kev nco txog Gadolinite, hom ore no hu ua gadolinite (tseem hu ua silicon beryllium yttrium ore). Xyoo 1803, German chemists MH Klaproth, Swedish chemists JJ Berzelius, thiab W. Hisinger feem nrhiav pom ib yam tshiab - ceria - los ntawm ib hom ore (cerium silicate ore). Xyoo 1839, Swedish CG Mosander nrhiav tau lanthanum. Xyoo 1843, Musander nrhiav tau terbium thiab erbium dua. Xyoo 1878, Swiss kws tshawb fawb Marinak nrhiav pom ytterbium. Xyoo 1879, samarium tau tshawb pom los ntawm Fab Kis Fab Kis Bouvabadrand, holmium thiab thulium tau pom los ntawm Swede PT Cleve, thiab scandium tau tshawb pom los ntawm Swede LF Nilson. Xyoo 1880, Swiss tus kws tshawb fawb Marinak nrhiav pom gadolinium. Xyoo 1885, Austrian A. von Wels bach nrhiav pom praseodymium thiab neodymium. Xyoo 1886, Bouvabadrand nrhiav pom dysprosium. Xyoo 1901, Fab Kis Fab Kis EA Demarcay nrhiav pom europium. Xyoo 1907, Fabkis nrhiav tau lutetium hauv G. Urban. Xyoo 1947, Asmeskas xws li JA Marinsky tau txais promethium los ntawm uranium fission khoom. Nws tau siv ntau tshaj 150 xyoo los ntawm kev sib cais ntawm yttrium ntiaj teb los ntawm Gadolin hauv 1794 mus rau kev tsim cov promethium hauv xyoo 1947.