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Europium(II) hydroxide

Names
Other names Europium dihydroxide
Identifiers
CAS Number	12020-56-3
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-2Key: IVBWDMZYNZPPBZ-UHFFFAOYSA-L
SMILES ..
Properties
Chemical formula	Eu(OH)2
Appearance	pale yellow
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

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.

Preparation

The monohydrate of europium(II) hydroxide can be obtained by the reaction of metal europium and 10 mol/L sodium hydroxide solution. 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.

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. It thermally decomposes to form europium(II) oxide (EuO); it is readily oxidized to europium(III) hydroxide in air.

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

• Europium(II) compounds
• Hydroxides