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Eugène-Anatole Demarçay (1 January 1852 – 5 March 1903)[1] was a French chemist. He studied under Jean-Baptiste Dumas. During an experiment, an explosion destroyed the sight in one of his eyes.

Eugène-Anatole Demarçay
Eugène-Anatole Demarçay
Born 1 January 1852
Died 5 March 1903 (1903-03-06) (aged 51)
Nationality French
Known for Spectrum
Discovering the element europium
Scientific career
Fields Chemist

He was a spectrum specialist. In 1896, he suspected samples of the recently discovered element samarium were contaminated with an unknown element, which he isolated in 1901, naming it europium. In 1898 he used his skills of spectroscopy to help Marie Curie confirm that she had discovered the element radium.[2]


  • Spectres électriques. Atlas ; Eugène Demarçay ; Paris : Gauthier-Villars, 1895. OCLC 54317437
  • Sur les acides tétrique et oxytétrique et leurs homologues ; Eugène Demarçay ; Paris : Gauthier-Villars, 1880. OCLC 25644291