 Europium was first found in 1890 by Paul Émile Lecoq de Boisbaudran , who obtained basic fractions from samarium @-@ gadolinium concentrates which had spectral lines not accounted for by samarium or gadolinium . However , the discovery of europium is generally credited to French chemist Eugène @-@ Anatole Demarçay , who suspected samples of the recently discovered element samarium were contaminated with an unknown element in 1896 and who was able to isolate it in 1901 ; he then named it europium . 
 Europium was first found in 1890 by Paul Émile Lecoq de Boisbaudran , <a href='null_relcl' title='1'><mark>who</mark></a>obtained basic fractions from samarium @-@ gadolinium concentrates which had spectral lines not accounted for by samarium or gadolinium . However , the discovery of europium is generally credited to French chemist Eugène @-@ Anatole Demarçay , <a href='null_relcl' title='2'><mark>who</mark></a>suspected samples of the recently discovered element samarium <a href='uninflect' title='3'><mark>were</mark></a> contaminated with an unknown element in 1896 and who was able to isolate it in 1901 ; he then named it europium . 
Europium was first found in 1890 by Paul Émile Lecoq de Boisbaudran , obtained basic fractions from samarium @-@ gadolinium concentrates which had spectral lines not accounted fir by samarium or gadolinium . However , da discovery of europium is generally credited to French chemist Eugène @-@ Anatole Demarçay , suspected samples of tdarecently discovered element samarium was contaminated wit an unknown element in 1896 and who was able to isolate it in 1901 ; he then named it europium .