Lectionary Calendar
Friday, November 22nd, 2024
the Week of Proper 28 / Ordinary 33
the Week of Proper 28 / Ordinary 33
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Bible Encyclopedias
Europium
1911 Encyclopedia Britannica
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a metallic chemical element, symbol Eu, atomic weight 152 0 (0 =16). The oxide Eu 2 0 3 occurs in very small quantity in the minerals of the rare earths, and was first obtained in 1896 by E. A. Demargay from Lecoq de Boisbaudran's samarium; G. Urbain and H. Lacombe in 1904 obtained the pure salts by fractional crystallization of the nitric acid solution with magnesium nitrate in the presence of bismuth nitrate. The salts have a faint pink colour, and show a faint absorption spectrum; the spark spectrum is brilliant and well characterized.
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These files are public domain.
These files are public domain.
Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Europium'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/e/europium.html. 1910.
Chisholm, Hugh, General Editor. Entry for 'Europium'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/e/europium.html. 1910.
