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89.0 Y; atomic weight YTTRIUM [symbol...

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Originally appearing in Volume V28, Page 942 of the 1911 Encyclopedia Britannica.
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89.0 Y; atomic See also:

weight See also:YTTRIUM [See also:symbol (0 =16)]  , a metallic chemical See also:element . In its See also:character See also:yttrium is closely allied to, and in nature is always associated with, See also:cerium, lanthanum, See also:didymium and See also:erbium (see RARE EARTHS) . For the preparation of yttrium compounds the best raw material is gadolinite, which, according to See also:Konig, consists of 22.61% of See also:silica, 34.64 of yttria, Y203, and 42.75 of the oxides of erbium, cerium, didymium, lanthanum, See also:iron, See also:beryllium, See also:calcium, See also:magnesium and See also:sodium . The extraction (as is the See also:case with all the rare earths) is a See also:matter of See also:great difficulty . Metallic yttrium is obtainable as a dark See also:grey See also:powder by reducing the chloride with See also:potassium, or by electrolysing the See also:double chloride of yttrium and sodium . It decomposes See also:water slowly in the See also:cold, and more rapidly on See also:heating . Yttria, Y203, is a yellowish See also:white powder, which at high temperatures radiates out a most brilliant white See also:light . It is soluble, slowly but completely, in See also:mineral acids . It is recognized by its very characteristic spark spectrum . Solutions of yttria salts in their behaviour to reagents are not unlike those of zirconia . The atomic See also:weight was determined by Cleve .

End of Article: 89.0 Y; atomic weight YTTRIUM [symbol (0 =16)]
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