Erbium(III) selenate is an inorganic compound, with the chemical formula Er2(SeO4)3. It exists as an anhydrate or an octahydrate.

erbium(III) selenate
Identifiers
3D model (JSmol)
  • InChI=1S/2Er.3H2O4Se/c;;3*1-5(2,3)4/h;;3*(H2,1,2,3,4)/q2*+3;;;/p-6
    Key: MOBNMXCYOYNHIL-UHFFFAOYSA-H
  • octahydrate: InChI=1S/2Er.3H2O4Se.8H2O/c;;3*1-5(2,3)4;;;;;;;;/h;;3*(H2,1,2,3,4);8*1H2/q2*+3;;;;;;;;;;;/p-6
    Key: XXAGZLDPUWOOJR-UHFFFAOYSA-H
  • anhydrous: [O-][Se](=O)(=O)[O-].[O-][Se](=O)(=O)[O-].[O-][Se](=O)(=O)[O-].[Er+3].[Er+3]
  • octahydrate: O.O.O.O.O.O.O.O.[O-][Se](=O)(=O)[O-].[O-][Se](=O)(=O)[O-].[O-][Se](=O)(=O)[O-].[Er+3].[Er+3]
Properties
Er2O12Se3
Molar mass 763.419 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Preparation and properties

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Monoclinic erbium(III) selenate octahydrate can be crystallized from the solution when dissolving erbium oxide in selenic acid:[1]

Er2O3 + 3 H2SeO4 + 5 H2O → Er2(SeO4)3·8H2O

Erbium(III) selenate octahydrate is first dehydrated by heating to obtain the anhydrous form, and then heated continuously to obtain erbium selenite and finally erbium(III) oxide.[1][2]

It can crystallize with M2SeO4 in aqueous solution to form double salts, such as K3Er(SeO4)3·nH2O[3] and NH4Er(SeO4)2·3H2O,[4] etc.

References

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  1. ^ a b Ina Krügermann, Mathias S. Wickleder (2004-09-01). "Crystal Structure and Thermal Behaviour of Er2(SeO4)3 · 8H2O". Zeitschrift für Naturforschung B. 59 (9): 958–962. doi:10.1515/znb-2004-0902. ISSN 1865-7117. S2CID 197635373. Retrieved 2020-05-29.
  2. ^ Bohumil Hajek, Nadezda Novotna, Jarmila Hradilova (Aug 1979). "Studies of thermal decompositions and infrared spectra of the rare earth selenate octahydrates Ln2(SeO4)3· 8H2O (Ln = Y,Tb,Dy,Ho,Er,Tm,Yb,Lu)". Journal of the Less Common Metals. 66 (2): 121–136. doi:10.1016/0022-5088(79)90222-4. Retrieved 2020-05-29.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  3. ^ M.A. Nabar, Veena R. Naik (Jul 1998). "Studies on selenates XIII: Synthesis and crystal chemical characterisation of K3Ln(SeO4)3.nH2O". Journal of Alloys and Compounds. 275–277: 54–57. doi:10.1016/S0925-8388(98)00273-4. Archived from the original on 2018-06-28. Retrieved 2020-05-29.
  4. ^ "Zhurnal Neorganicheskoi Khimii (Inorganic Chemistry) is 50". Russian Journal of Inorganic Chemistry. 51 (5): 844–845. May 2006. doi:10.1134/s0036023606050287. ISSN 0036-0236. S2CID 189775040.