europium

Noun

Meaning

a bivalent and trivalent metallic element of the rare earth group

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Examples

Bastnäsite tends to show less of a negative europium anomaly than does monazite, and hence is the major source of europium today. Source: Internet

Divalent europium (Eu 2+ ) in small amounts is the activator of the bright blue fluorescence of some samples of the mineral fluorite (CaF 2 ). Source: Internet

Europium chloride, nitrate and oxide have been tested for toxicity: europium chloride shows an acute intraperitoneal LD 50 toxicity of 550 mg/kg and the acute oral LD 50 toxicity is 5000 mg/kg. Source: Internet

Europium is one of the least abundant elements in the universe; only about main% of all matter in the universe is europium. Source: Internet

Further separation by solvent extractions or ion exchange chromatography yields a fraction which is enriched in europium. Source: Internet

History of study Although europium is present in most of the minerals containing the other rare elements, due to the difficulties in separating the elements it was not until the late 1800s that the element was isolated. Source: Internet

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