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Encyclopedia Britannica



SCANDIUM [symbol Sc, atomic weight 44.1 (0=16)]

This article appears in Volume V24, Page 298 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: SAR-SCY
SCANDIUM [symbol Sc, atomic weight 44.1 (0=16)] , one of the rare earth metals. It was isolated in 1879 by L. F, Nilson and was shown by Cleve to be identical with the ekaboron predicted by D. Mendeleeff. The separation of
scandium
  from
wolframite
  (which contains 0.14-o.16% of rare earths) is given by R. J.
Meyer
  (Zeit, anorg. Chem. 1908, 6o, p. 134), but it seems impossible to obtain a perfectly pure specimen of the
oxide
 . The salts of
scandium
  are all colourless, the chloride and bromide corresponding in
composition
  to Sc2X5'12H20; the fluoride is anhydrous. The sulphate combines with the alkaline sulphates to form
double
  salts of the type Sc2(SO4)s'3K2SO4. A large number of salts, both of in-organic and organic acids, have been described by Sir W. Crookes (Phil. Trans. 1908, 209, A. p. 15); those of the fatty acids are in most cases more soluble in cold than in hot water.


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