Europium(III) sulfate

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); white (octahydrate)
Density	4.99 g/cm3
Solubility in water	0.021 g/mL (20°C)
Structure
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 their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Europium(III) sulfate is a europium compound with the chemical formula Eu₂(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 the anhydrous form at 375 °C.^[1]

Preparation

Europium(III) sulfate can be prepared by reacting europium(III) oxide with sulfuric acid:^[1]

Eu₂O₃ + 3 H₂SO₄ → Eu₂(SO₄)₃ + 3 H₂O

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

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

Reactions

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

References

^ ^a ^b ^c ^d ^e ^f ^g Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 168. ISBN 978-1-4398-1462-8.
^ ^a ^b ^c Denisenko, 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 ^b Andreev, 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.

[handbook-1] ^ ^a ^b ^c ^d ^e ^f ^g Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 168. ISBN 978-1-4398-1462-8.

[Denisenko-2] Denisenko, 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.

[3] 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.

[andreev-4] Andreev, 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.

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