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
CAS Number	12020-56-3 Y
3D model (JSmol)	Interactive image
ChemSpider	24769659
PubChem CID	101288893
CompTox Dashboard (EPA)	DTXSID101337287
InChI InChI=1S/Eu.2H2O/h;2*1H2/q+2;;/p-2 Key: IVBWDMZYNZPPBZ-UHFFFAOYSA-L
SMILES [OH-].[OH-].[Eu+2]
Properties
Chemical formula	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]