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Europium(III) sulfate

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Europium(III) sulfate
Names

IUPAC name Europium(III) sulfate
Other names Dieuropium(3+) trisulphate Europic sulfate
Identifiers
CAS Number	13537-15-0 octahydrate: 10031-55-7
3D model (JSmol)	Interactive image octahydrate: Interactive image
ChemSpider	8005731 octahydrate: 21241401
ECHA InfoCard	100.033.534
EC Number	236-903-3 octahydrate: 680-960-0
PubChem CID	9829996 octahydrate: 25021676
CompTox Dashboard(EPA)	DTXSID40928976 octahydrate: DTXSID60648467
InChI InChI=1S/2Eu.3H2O4S/c;;31-5(2,3)4/h;;3(H2,1,2,3,4)/q2+3;;;/p-6 Key: FBUHTUYBHREGEH-UHFFFAOYSA-H octahydrate: InChI=1S/2Eu.3H2O4S.8H2O/c;;31-5(2,3)4;;;;;;;;/h;;3(H2,1,2,3,4);81H2/q2*+3;;;;;;;;;;;/p-6 Key: PGDXJFDXKJLVTJ-UHFFFAOYSA-H
SMILES [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Eu+3].[Eu+3] octahydrate: O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Eu+3].[Eu+3]
Properties
Chemical formula	Eu₂(SO₄)₃
Molar mass	592.10 g·mol⁻¹
Appearance	light pink (anhydrous)^[1] white (octahydrate)^[1]
Density	4.99 g/cm³^[1]
Solubility in water	0.021 g/mL (20°C)^[1]
Structure^[2]
Crystal structure	monoclinic
Space group	C2/c
Lattice constant	a = 21.2787 Å,b = 6.6322 Å,c = 6.8334 Å
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315,H319,H335
Precautionary statements	P261,P264,P264+P265,P271,P280,P302+P352,P304+P340,P305+P351+P338,P319,P321,P332+P317,P337+P317,P362+P364,P403+P233,P405,P501
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chemical compound

Europium(III) sulfate is aeuropium compound with thechemical formulaEu₂(SO₄)₃·nH₂O (n = 0, 1, 4, or 8).^[3] It is a light pink crystalline solid,^[1] stable in air up to 670 °C.^[2] The octahydrate dehydrates to theanhydrous form at 375 °C.^[1]

Preparation

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Europium(III) sulfate can be prepared by reactingeuropium(III) oxide withsulfuric acid:^[1]

Eu₂O₃ + 3 H₂SO₄ → Eu₂(SO₄)₃ + 3 H₂O

It can also be precipitated from a solution ofeuropium(III) nitrate upon the addition of sulfuric acid:^[2]

2 Eu(NO₃)₃ + 3 H₂SO₄ → Eu₂(SO₄)₃ + 6 HNO₃

Reactions

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Europium(III) sulfate can be reduced toeuropium(II) sulfate with hydrogen gas at 480-500 °C.^[4] At temperatures between 600-1000 °C an oxysulfide (Eu₂O₂S) forms instead.^[4]

References

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^^a ^b ^c ^d ^e ^f ^gPerry, Dale L. (2016-04-19).Handbook of Inorganic Compounds. CRC Press. p. 168.ISBN 978-1-4398-1462-8.
^^a ^b ^cDenisenko, Yu. G.; Aleksandrovsky, A. S.; Atuchin, V. V.; Krylov, A. S.; Molokeev, M. S.; Oreshonkov, A. S.; Shestakov, N. P.; Andreev, O. V. (2018-12-25)."Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups".Journal of Industrial and Engineering Chemistry.68:109–116.doi:10.1016/j.jiec.2018.07.034.ISSN 1226-086X.
^Denisenko, Yu. G.; Khritokhin, N. A.; Andreev, O. V.; Basova, S. A.; Sal’nikova, E. I.; Polkovnikov, A. A. (2017-11-01)."Thermal decomposition of europium sulfates Eu2(SO4)3·8H2O and EuSO4".Journal of Solid State Chemistry.255:219–224.doi:10.1016/j.jssc.2017.08.020.ISSN 0022-4596.
^^a ^bAndreev, O. V.; Denisenko, Yu. G.; Sal’nikova, E. I.; Khritokhin, N. A.; Zyryanova, K. S. (2016-03-01)."Specifics of reactions of cerium sulfate and europium sulfate with hydrogen".Russian Journal of Inorganic Chemistry.61 (3):296–301.doi:10.1134/S0036023616030025.ISSN 1531-8613.

Europium compounds

Europium(II)

Europium(III)

Organoeuropium(III)	Eu(C₅H₇O₂)₃ Eu(fod)₃ Eu(hfc)₃

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