Europium(III) arsenate

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Europium(III) arsenate
Names
Other names
Europium arsenate
Identifiers
3D model (JSmol)
  • InChI=1S/AsH3O4.Eu/c2-1(3,4)5;/h(H3,2,3,4,5);/q;+3/p-3
    Key: LTLQVFNGOCEORU-UHFFFAOYSA-K
  • [O-][As](=O)([O-])[O-].[Eu+3]
Properties
EuAsO4
Appearance solid
insoluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Europium(III) arsenate is an arsenate salt of europium, with the chemical formula of EuAsO4. It has good thermal stability, with its pKsp,c of 22.53±0.03.[1] It is a colorless crystal with a xenotime structure.[2]

Preparation

Europium(III) arsenate can be prepared by reacting sodium arsenate (Na3AsO4) in a europium(III) chloride (EuCl3) solution:[3]

Na3AsO4 + EuCl3 → 3 NaCl + EuAsO4↓

Reacting europium(III) oxide (Eu2O3) with arsenic pentoxide (As2O5) can also obtain europium(III) arsenate.[2]

Eu2O3 + As2O5 → 2EuAsO4

References

  1. ^ Firsching, F. Henry (October 1992). "Solubility products of the trivalent rare-earth arsenates". Journal of Chemical & Engineering Data. 37 (4): 497–499. doi:10.1021/je00008a028.
  2. ^ a b Golbs, Sylvia; Cardoso-Gil, Raul; Schmidt, Marcus (2009). "Crystal structure of europium arsenate, EuAsO4". Zeitschrift für Kristallographie - New Crystal Structures. 224 (2): 169–170. doi:10.1524/ncrs.2009.0076. ISSN 2197-4578. S2CID 95164970.
  3. ^ Gabisoniya, Ts. D.; Nanobashvili, E. M.. Synthesis of rare earth metal arsenates. Soobshcheniya Akademii Nauk Gruzinskoi SSR (1980), 97(2), 345-8. ISSN 0002-3167
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