Shining In the Fields of Optics and Medicine ── Europium
Introduction Europium (Eu) is found in most rare-earth minerals, but its separation was difficult, so it wasn’t isolated until the late 1800s. In 1885, William Crookes analyzed the spectra of rare elements and identified some “anomalous” spectral lines, later found to belong to europium. In 1892, Paul-Émile Lecoq de Boisbaudran first discovered europium by observing …
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