Marc Delafontaine
From Infogalactic: the planetary knowledge core
Lua error in package.lua at line 80: module 'strict' not found. Marc Delafontaine (Born at Celigny, 1837–1911) 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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