europium

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europium (symbol Eu) Silvery-white metallic element of the lanthanide series. Its chief ores are monazite and bastnaesite. The metal is used in the manufacture of colour television screens, lasers, and in control rods in nuclear reactors. Properties: at.no. 63; r.a.m. 151.96; r.d. 5.25; m.p. 822°C (1512°F); b.p. 1597°C (2907°F); most common isotope Eu153 (52.18%).

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