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atomic See also:weight 44.1 See also:SCANDIUM [See also:symbol Sc (0=16)] , one of the rare See also: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 See also:scandium from See also:wolframite (which contains 0.14-o.16% of rare earths) is given by R . J . See also:Meyer (Zeit, anorg . Chem . 1908, 6o, p . 134), but it seems impossible to obtain a perfectly pure specimen of the See also:oxide . The salts of scandium are all colourless, the chloride and bromide corresponding in See also:composition to Sc2X5'12H20; the fluoride is anhydrous . The sulphate combines with the alkaline sulphates to See also:form See also: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 See also:Sir W . See also:Crookes (Phil . Trans . 1908, 209, A. p . 15); those of the fatty acids are in most cases more soluble in See also:cold than in hot See also:water . |
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