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GADOLINIUM (symbol Gd., atomic weight...

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Originally appearing in Volume V11, Page 383 of the 1911 Encyclopedia Britannica.
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GADOLINIUM (symbol Gd., atomic weight 157.3), one of the rare earth metals (see ERBIUM). The element was discovered in 188o in the mineral samarskite by C. Marignac (Comptes rendus, ,88o, 9o, p. 899; Ann. chim. phys., 188o [s] 20, p. 535). G. Urbain (Comptes rendus, 1905, 140, p. 583) separates the metal by crystallizing the double nitrate of nickel and gadolinium. The salts show absorption bands in the ultra-violet. The oxide Gd203 is colourless (Lecoq de Boisbaudran).
End of Article: GADOLINIUM (symbol Gd., atomic weight 157.3)

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