— lanthanides (métaux terrestres rares): lanthane, praséodyme, samarium, gadolinium, dysprosium, erbium, ytterbium, cerium, néodyme, europium, terbium, holmium, thulium ou lutécium
— lanthaniden (zeldzame aardmetalen): lanthaan, praseodymium, samarium, gadolinium, dyprosium, erbium, ytterbium, cerium, neodymium, europium, terbium, holmium, thulium, lutetium.EurLex-2 EurLex-2