lanthanoid (rare earth series), namely: lanthanum La57 [[鑭|镧<lán>]], cerium Ce58 [[鈰|铈<shì>]], praseodymium Pr59 [[鐠|镨<pǔ>]], neodymium Nd60 [[釹|钕<nǚ>]], promethium Pm61 [[鉕|钷<pǒ>]], samarium Sm62 [[釤|钐<shān>]], europium Eu63 [[銪|铕<yǒu>]], gadolinium Gd64 [[釓|钆<gá>]], terbium Tb65 [[鋱|铽<tè>]], dysprosium Dy66 [[鏑|镝<dī>]], holmium Ho67 [[鈥|钬<huǒ>]], erbium Er68 [[鉺|铒<ěr>]], thulium Tm69 [[銩|铥<diū>]], ytterbium Yb70 [[鐿|镱<yì>]], lutetium Lu71 [[鎦|镏<liú>]]