Cerium(IV) selenate

Cerium(IV) selenate
Identifiers
CAS Number	anhydrous: 131362-39-5 ; tetrahydrate: 65627-67-0 ;
3D model (JSmol)	anhydrous: Interactive image; tetrahydrate: Interactive image;
	InChI InChI=1S/Ce.2H2O4Se/c;21-5(2,3)4/h;2(H2,1,2,3,4)/q+4;;/p-4 Key: KFWCNHLRVFJXRB-UHFFFAOYSA-J;
	SMILES anhydrous: [Ce+4].[O-][Se](=O)(=O)[O-].[O-][Se]([O-])(=O)=O; tetrahydrate: [Ce+4].[O-][Se](=O)(=O)[O-].[O-][Se]([O-])(=O)=O.O.O.O.O;
Properties
Chemical formula	Ce(SeO4)2
Appearance	yellow crystals
Density	3.41 g·cm−3
Solubility in water	insoluble
Related compounds
Other anions	cerium(IV) sulfate
Other cations	lanthanum(III) selenate; praseodymium(III) selenate; thorium(IV) selenate
Related compounds	cerium(III) selenate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Cerium(IV) selenate is an inorganic compound with the chemical formula Ce(SeO₄)₂.

Preparation

Cerium(IV) selenate can be obtained by reacting cerium(IV) hydroxide with hot selenic acid, and the tetrahydrate can be crystallized from the solution.^[2]

Properties

Cerium(IV) selenate has a space group of Pbca, and its unit cell parameters are a = 9.748 Å, b = 9.174 Å, and c = 13.740 Å.^[1]^[3]

The tetrahydrate has orthorhombic space group Fddd with unit cell dimensions a = 27.31, b = 12.38, c = 5.736 Å.^[2]

It hydrolyzes when exposed to water and can be reduced to trivalent cerium using hydrogen peroxide.^[4]

References

^ ^a ^b Gschneidner, Karl A.; Bünzli, Jean-Claude G.; Pecharsky, Vitalij K. (2005). Handbook on the physics and chemistry of rare earths. Amsterdam: Elsevier. ISBN 978-0-444-52028-9.
^ ^a ^b M. A. Nabar, V. R. Ajgaonkar (1978-02-01). "Studies on selenates. III. Crystal chemical data for zirconium and cerium selenate tetrahydrates". Journal of Applied Crystallography. 11 (1): 56–57. Bibcode:1978JApCr..11...56N. doi:10.1107/S0021889878012686. ISSN 0021-8898. Archived from the original on 2018-06-03. Retrieved 2020-04-23.
^ Iskhakova, L. D.; Kozlova, N. P.; Marugin, V. V. Crystal structure of cerium selenate (Ce(SeO₄)₂). Kristallografiya, 1990. 35 (5): 1089-1093. ISSN: 0023-4761.
^ Meyer, Julius; Schulz, Franziska (1931-01-07). "Zur Kenntnis der Ceriselenate". Zeitschrift für anorganische und allgemeine Chemie. 195 (1): 127–128. doi:10.1002/zaac.19311950114. ISSN 0863-1786.

[RE-1] Gschneidner, Karl A.; Bünzli, Jean-Claude G.; Pecharsky, Vitalij K. (2005). Handbook on the physics and chemistry of rare earths. Amsterdam: Elsevier. ISBN 978-0-444-52028-9.

[nab-2] M. A. Nabar, V. R. Ajgaonkar (1978-02-01). "Studies on selenates. III. Crystal chemical data for zirconium and cerium selenate tetrahydrates". Journal of Applied Crystallography. 11 (1): 56–57. Bibcode:1978JApCr..11...56N. doi:10.1107/S0021889878012686. ISSN 0021-8898. Archived from the original on 2018-06-03. Retrieved 2020-04-23.

[3] Iskhakova, L. D.; Kozlova, N. P.; Marugin, V. V. Crystal structure of cerium selenate (Ce(SeO₄)₂). Kristallografiya, 1990. 35 (5): 1089-1093. ISSN: 0023-4761.

[4] Meyer, Julius; Schulz, Franziska (1931-01-07). "Zur Kenntnis der Ceriselenate". Zeitschrift für anorganische und allgemeine Chemie. 195 (1): 127–128. doi:10.1002/zaac.19311950114. ISSN 0863-1786.

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