Europium(II) hydroxide

Europium(II) hydroxide is an inorganic compound, with the chemical formula of Eu(OH)2. It can exist as the dihydrate Eu(OH)2·H2O.

Europium(II) hydroxide
Names
Other names
Europium dihydroxide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/Eu.2H2O/h;2*1H2/q+2;;/p-2
    Key: IVBWDMZYNZPPBZ-UHFFFAOYSA-L
  • [OH-].[OH-].[Eu+2]
Properties
Eu(OH)2
Appearance pale yellow[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

The monohydrate of europium(II) hydroxide can be obtained by the reaction of metal europium and 10 mol/L sodium hydroxide solution.[1] There are some sources that use europium(III) chloride as a raw material, and prepare it by reacting the Jones reductor with sodium hydroxide solution.[2]

Properties

Europium(II) hydroxide belongs to the orthorhombic crystal system, a=6.701 ± 0.002, b=6.197 ± 0.002, c=3.652 ± 0.001 A.[1] It thermally decomposes to form europium(II) oxide (EuO); it is readily oxidized to europium(III) hydroxide in air.[3]

References
  1. H. Baernighausen. Lattice constants and space group of the isotypic compounds Eu(OH)2.H2O, Sr(OH)2.H2O, and Ba(OH)2.H2O. Zeitschrift fuer Anorganische und Allgemeine Chemie, 1966. 342 (5-6): 233-239. ISSN: 0044-2313.
  2. Garton, G.; Hukin, D. A. Studies of some europium(II) compounds. Proc. Conf. Rare Earth Res., 3rd, Clearwater, Florida, 1964. (1963) 3-10.
  3. 无机化学丛书 第七卷 钪 稀土元素. 科学出版社. pp 202, 204-205
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