Thulium(III) oxide

• Dithuliumtrioxid
• Thuliumsesquioxid
• Thulium
• Thulia

White to slightly greenish solid

Fixed

8.6 g · cm -3

2341 ° C

3945 ° C

Attention

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

History

Thulium (III ) oxide in 1879 by the Swedish chemist Per Teodor Cleve together with holmium in Erbia ( erbium oxide ) discovered (see History of the holmium ), after he had in 1874 established the presence of several impurities in this.

Occurrence

Thulium (III ) oxide occurs in very low concentrations in the minerals monazite (0.002 %) and Bastnäsit ( 0.0008 %) before. The world production of thulium in the form of thulium is about 50 tons per year.

Production and representation

Thulium (III ) oxide can be obtained by burning in air thulium.

It can be obtained at temperatures around 700 ° C by thermal decomposition of Thuliumoxalat, Thuliumcarbonat or Thuliumacetat.

Properties

Thulium (III ) oxide is a white to slightly greenish solid. It has a cubic crystal structure.

Use

Thulium (III ) oxide is used in glass, optical and ceramic industry.