Europium(II) hydroxide
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| Other names
Europium dihydroxide
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| 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).
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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
[edit]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
[edit]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
[edit]- ^ a b c 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.
- ^ Garton, G.; Hukin, D. A. Studies of some europium(II) compounds. Proc. Conf. Rare Earth Res., 3rd, Clearwater, Florida, 1964. (1963) 3-10.
- ^ 无机化学丛书 第七卷 钪 稀土元素. 科学出版社. pp 202, 204-205