Europium (III) hydroxide
Crystal structure | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
__ Eu 3+ __ OH - | ||||||||||||||||
General | ||||||||||||||||
Surname | Europium (III) hydroxide | |||||||||||||||
other names |
Europium trihydroxide |
|||||||||||||||
Ratio formula | Eu (OH) 3 | |||||||||||||||
Brief description |
white solid |
|||||||||||||||
External identifiers / databases | ||||||||||||||||
|
||||||||||||||||
properties | ||||||||||||||||
Molar mass | 202.99 g mol −1 | |||||||||||||||
Physical state |
firmly |
|||||||||||||||
solubility |
|
|||||||||||||||
safety instructions | ||||||||||||||||
|
||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Europium (III) hydroxide is an inorganic chemical compound of europium from the group of hydroxides .
Extraction and presentation
Europium (III) hydroxide can be obtained by reacting europium with water . It is also produced by the decomposition of the unstable europium (II) hydroxide hydrate.
Europium (III) hydroxide can also be obtained by reacting europium (III) nitrate with hexamethylenetetramine at 95 ° C or ammonium hydroxide.
properties
Europium (III) hydroxide is a white solid that is practically insoluble in water. It has a hexagonal crystal structure with the space group P 6 3 / m (space group no. 176) . At temperatures between 225 and 300 ° C the compound decomposes to europium oxide hydroxide EuOOH, which decomposes to europium (III) oxide at temperatures above 425 ° C.
use
Europium (III) hydroxide is used as a phosphor activator for color cathode ray tubes and liquid crystal displays.
Individual evidence
- ↑ a b c d e f metall.com.cn: Europium Hydroxide 99.9% -99.999% from Metall Rare Earth Limited , accessed January 2, 2018
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ^ Leroy Eyring: Progress in the Science and Technology of the Rare Earths . Elsevier, 2016, ISBN 978-1-4831-5777-1 , pp. 455 ( limited preview in Google Book search).
- ↑ Handbook on the Physics and Chemistry of Rare Earths . Elsevier, 2010, ISBN 978-0-444-53591-7 , pp. 330 ( limited preview in Google Book search).
- ↑ Ross J. Hunter, Victor R. Preedy: Nanomedicine and the Cardiovascular System . CRC Press, 2011, ISBN 978-1-4398-7989-4 , pp. 373 ( limited preview in Google Book search).
- ↑ DF Mullica, WO Milligan, GW Beall: Crystal structures of Pr (OH) 3, Eu (OH) 3 and Tm (OH) 3. In: Journal of Inorganic and Nuclear Chemistry. 41, 1979, p. 525, doi : 10.1016 / 0022-1902 (79) 80438-8 .
- ↑ ROBERT C. RAU, WJ GLOVER: Thermal Decomposition of Europium Hydroxide. In: Journal of the American Ceramic Society. 47, 1964, p. 382, doi : 10.1111 / j.1151-2916.1964.tb13836.x .