Samarium(III) oxide

• Samariumsesquioxid
• Disamariumtrioxid
• Samaria

Odorless yellowish solid

Fixed

8.347 g · cm -3

2325 ° C

Insoluble in water (20 ° C)

> 5000 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

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

History

Samarium (III ) oxide was discovered in 1879 by Paul Émile Lecoq de Boisbaudran in Samarskite.

Production and representation

Samarium (III ) oxide can be recovered by combustion of samarium in air.

It can also be obtained by thermal decomposition of Samariumsalzen as Samariumoxalat or Samariumcarbonat at temperatures around 700 ° C.

Samarium (III ) oxide nanoparticles can be obtained by reaction of Samariumhydrid with oxygen.

A total of about 700 tons are produced annually.

Properties

Samarium (III ) oxide is an odorless yellowish solid which is insoluble in water. It occurs in a monoclinic and cubic crystal structure, the cubic shape is more stable and more frequently.

Use

Samarium (III ) oxide is used in infrared radiation absorbing glass. In organic chemistry, it catalyzes the reaction of the acyclic primary alcohols to aldehydes and ketones. Another application is the production of other Samariumsalzen.