Refractories holmium

There is only one oxide of holmium, which sometimes is called holmia the oxide (2Ho + 30 —> HojOj) is a pale yellow sohd used as a special catalyst to speed up chemical reactions and as a refractory material to line laboratory and industrial ovens. 

Hohnium oxide occurs in nature, usually associated with small quantities of other rare-earth oxides. Commercial applications of this compound have not been explored fuUy. It is used in refractories and as a catalyst. Characteristic spectral emission lines of holmium oxide glass are used to cahbrate spectrophotometers. ... 

Holmium 67 Ho Electronic devices, catalysts, refractories, magnetic materials, magnetostrictive alloys... 

Few holmium compounds have any important commercial uses. The one exception is holmium oxide (H02O3), used to add a yellowish color to glass, in the manufacture of refractory materials, and as a catalyst for some chemical reactions. A refractory material is a material that can withstand very high temperatures and reflect heat back away from itself A catalyst is a substance used to speed up a chemical reaction without undergoing any change itself In 2007, the price of holmium oxide was approximately 750 per kilogram. 

EINECS 235-015-3 Holmium oxide Holmium oxide (H02O3), Refractories, special catalyst, Atomergic Chemetats Cerac Noah Chem. Rhdne-Poulenc. 

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