Marc Delafontaine
Chemist, Chemical Element Discoverer
1837 – 1911
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Who was Marc Delafontaine?
Marc Delafontaine was a Swiss chemist who in 1878, along with Jacques-Louis Soret, first observed holmium spectroscopically. In 1879, Per Teodor Cleve chemically separated it from thulium and erbium. The three are given credit for the element's discovery.
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