Europium (II) chloride

Crystal structure
	__ Eu 2+ __ Cl -
General
Surname	Europium (II) chloride
other names	Europium dichloride
Ratio formula	EuCl 2
Brief description	white to pale pink solid
External identifiers / databases
EC number	237-386-7
ECHA InfoCard	100,033,973
PubChem	83719
ChemSpider	75541
Wikidata	Q4498206
properties
Molar mass	222.87 g mol −1
Physical state	firmly
density	4.86 g cm −3
Melting point	757 ° C
boiling point	> 2000 ° C
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Europium (II) chloride is an inorganic chemical compound from the group of chlorides .

Extraction and presentation

Europium (II) chloride can be prepared by reducing europium (III) chloride with hydrogen .

{\ displaystyle \ mathrm {2 \ EuCl_ {3} + H_ {2} \ longrightarrow 2 \ EuCl_ {2} +2 \ HCl}}

The link can also by reduction with lithium - naphthalene win.

{\ displaystyle \ mathrm {EuCl_ {3} + Li \ longrightarrow EuCl_ {2} + LiCl}}

The dihydrate can be obtained by reducing europium (III) compounds (e.g. europium (III) oxide ) in a hydrochloric acid solution with zinc and subsequent reaction with concentrated hydrochloric acid .

properties

Europium (II) chloride is a white to pale pink solid. It has an orthorhombic crystal structure of the lead (II) chloride type with the space group Pbnm (space group no. 62, position 3) . The high-temperature modification has a cubic crystal structure with the space group Fm 3 (no. 202) . The dihydrate is a white solid that has a pale bluish fluorescence in daylight and which crystallizes in flaky form. It is very sensitive to oxidation and air and has a monoclinic crystal structure isotype with that of strontium (II) chloride dihydrate and the space group C 2 / c (No. 15) (a = 1167.8 pm , b = 641.3 pm , c = 670.5 pm, β = 105.3 °). Template: room group / 62.3Template: room group / 202Template: room group / 15

Individual evidence

↑ ^a ^b ^c ^d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , pp. 1083, 1093.
↑ ^a ^b Datasheet Europium (II) chloride, 99.99% trace metals basis from Sigma-Aldrich , accessed on April 18, 2013 ( PDF ).
↑ ^a ^b ^c ^d ^e Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 446–447 ( limited preview in Google Book Search).
↑ Kurt Rossmanith: Production of the classic rare earth (II) chlorides in solution. In: Monthly magazine for chemistry. 110, 1979, pp. 109-114, doi: 10.1007 / BF00903752 .

[brauer-1] Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , pp. 1083, 1093.

[Sigma-2] Datasheet Europium (II) chloride, 99.99% trace metals basis from Sigma-Aldrich , accessed on April 18, 2013 ( PDF ).

[D_Ans_Lax-3] Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 446–447 ( limited preview in Google Book Search).

[DOI10.1007/BF00903752-4] Kurt Rossmanith: Production of the classic rare earth (II) chlorides in solution. In: Monthly magazine for chemistry. 110, 1979, pp. 109-114, doi: 10.1007 / BF00903752 .