Dysprosium(III) oxide

Dysprosia

White, slightly hygroscopic powder

Fixed

7.81 g · cm -3 ( 25 ° C)

2310 ° C

3900 ° C

• Insoluble in water
• Soluble in acids

1.9757

> 5000 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Dysprosium ( III) oxide is a chemical compound selected from the group of the oxides.

History

Erbiumerze were discovered in 1878, which contained in addition to this and holmium and thulium (III ) oxide. The French chemist Paul Émile Lecoq de Boisbaudran could while working with Holmium (III ) oxide in 1886 in Paris still isolate dysprosium ( III ) oxide and thus discovered the element dysprosium.

Production and representation

Dysprosium ( III) oxide can be recovered by combustion of dysprosium in air.

Properties

Dysprosium ( III ) oxide is a white, slightly hygroscopic powder that is insoluble in water and strongly magnetic. It has a cubic crystal structure. It reacts with acids forming cations, which in turn react weakly acidic in water.

Use

Dysprosium ( III ) oxide is used for special purposes in glass, phosphors, lasers, and metal halide lamps. It is still used in cermets to nuclear reactor control rods. As a dopant for Bariumtitanatoxid capacitors it is used for small capacitors with high capacitance. Due to its magnetic properties, it is interesting for motors and generators.