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Europium(III) chloride
*** Shopping-Tip: Europium(III) chloride
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Image:Europium(III)_chloride_hexahydrate.jpg 150px|Crystals of europium(III) chloride hexahydrate
|-
| Other names
| Europium trichloride
|-
|
Molecular formula
| EuCl
3
|-
|
Molar mass
| 258.32 g/mol (''anhydr.'')
|-
|
CAS number
| [10025-76-0] (''anhydr.'')
|-
|
Density
| 4.89 g/cm
3
|-
|
Solubility (
Water_(molecule) water)
| Soluble
|-
|
Melting point
| 632 °C ''decomp.''
|-
|
EINECS number
| 233-040-4
|-
|
RTECS number
| LE7525000
|-
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wikipedia:Chemical infobox Disclaimer and references
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''' Europium(III) chloride''' is a compound of
europium and
chlorine with the
molecular formula EuCl
3.
Properties
Europium trichloride is a yellow solid which begins to decompose at or below its melting point to give at least some
europium(II) chloride EuCl2. Being
hygroscopic it rapidly absorbs water on exposure to moist air to form a white crystalline hexa
hydrate, EuCl
3.6H
2O (''M''
r = 366.41 g/mol;
CAS number [13759-92-7]). It is soluble in
water, and (when anhydrous) it is expected to be also highly
soluble in
ethanol (by analogy with
samarium(III) chloride SmCl3). It is nine-coordinate (trigonal prismatic), and it crystallises with the
uranium(III) chloride UCl3 structure.{{ref|old3}}
Preparation of anhydrous EuCl3
Simple rapid heating of the
hydrate alone may cause small amounts of
hydrolysis.
Anhydrous EuCl
3 can be made from the hydrate by heating with an excess of
thionyl chloride for around 15 hours.{{ref|old4}}
Uses
Europium(III) chloride can be used for the preparation of
europium(II) chloride by reduction in a gold boat using
hydrogen gas while heating slowly to 700 °C. The anhydrous
chloride may also be used to prepare
organometallic compounds of europium, such as bis(pentamethylcyclopentadienyl)europium(II) complexes.{{ref|old5-6}} Europium(III) chloride can be used as a starting point for the preparation of other
europium salts.
Suppliers
-
Alfa
-
GFS
-
Sigma-Aldrich Co.
-
Strem
In the US, several of these suppliers also distribute through:
*[https://www1.fishersci.com/index.jsp Fisher]
-
VWR
Bibiography
* Edelmann, F. T.; & Poremba, P. (1997). in: ''Synthetic Methods of Organometallic and Inorganic Chemistry'' (Herrmann, E. A., Ed.) Vol. 6. Stuttgart:Georg Thieme.
* {{RubberBible53rd}}
References
# {{note|old3}} {{Greenwood&Earnshaw}}
# {{note|old4}} Freeman, J. H.; & Smith, M. L. (1958). ''J. Inorg. Nucl. Chem.'' '''7''': 224.
# {{note|old5-6}} Tilley, T. D. ''et al.'' (1980). ''Inorg. Chem.'' '''19''': 2999. Evans, W. J.; Hughes, L. A.; & Hanusa, T. P. (1986). ''Organometallics'' '''5''': 1285.
Category:Chlorides
Category:Europium compounds
Category:Metal halides
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