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A rare trivalent metallic element, found in gadolinite and other minerals. Symbol: Y, at. wt.: 88.905, at. no.: 39, sp. gr.: 4.47. Cf."rare-earth element."

Yttrium has a silver-metallic luster and is relatively stable in air unless finely divided. Turnings of the metal, however, ignite in air if their temperature exceeds 400oC. Yttrium oxide is one of the most important compounds of yttrium and accounts for the largest use. It is widely used in making YVO4 europium, and Y2O3 europium phosphors to give the red color in color television tubes.

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A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.

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A liquid as defined by NFPD and DOT as having a flash point below 37.8°C (100°F).

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Chemical Kinetics

The study of rates and mechanisms of chemical reactions and of the factors on which they depend.

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