Marc Delafontaine

Marc Delafontaine
Born	March 31, 1837 or 1838 Céligny, Switzerland
Nationality	Swiss
Known for	holmium
Scientific career
Institutions	University of Geneva

Marc Delafontaine (March 31, 1837/1838, Céligny, Switzerland^[a]–1911^[b]) was a Swiss chemist and spectroscopist who was involved in discovering and investigating some of the rare earth elements.
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