Holmium(III) oxalate

Holmium(III) oxalate is the oxalate salt of holmium, with the chemical formula Ho2(C2O4)3. It exists in anhydrous and hydrated forms.

Holmium(III) oxalate
Identifiers
3D model (JSmol)
  • InChI=1S/3C2H2O4.2Ho/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;2*+3/p-6
    Key: DYYFBWLZDJSPGO-UHFFFAOYSA-H
  • dihydrate: InChI=1S/3C2H2O4.2Ho.2H2O/c3*3-1(4)2(5)6;;;;/h3*(H,3,4)(H,5,6);;;2*1H2/q;;;2*+3;;/p-6
    Key: MIBITVHERFMSTH-UHFFFAOYSA-H
  • decahydrate: InChI=1S/3C2H2O4.2Ho.10H2O/c3*3-1(4)2(5)6;;;;;;;;;;;;/h3*(H,3,4)(H,5,6);;;10*1H2/q;;;2*+3;;;;;;;;;;/p-6
    Key: OKKLEXNPKBZYQY-UHFFFAOYSA-H
  • [Ho+3].[Ho+3].[O-]C(=O)C(=O)[O-].[O-]C(=O)C(=O)[O-].[O-]C(=O)C(=O)[O-]
  • dihydrate: [Ho+3].[Ho+3].[O-]C(=O)C(=O)[O-].[O-]C(=O)C(=O)[O-].[O-]C(=O)C(=O)[O-].O.O
  • decahydrate: [Ho+3].[Ho+3].[O-]C(=O)C(=O)[O-].[O-]C(=O)C(=O)[O-].[O-]C(=O)C(=O)[O-].O.O.O.O.O.O.O.O.O.O
Properties
Ho2(C2O4)3
Appearance yellow crystals (heptahydrate)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Properties

Holmium(III) oxalate decahydrate decomposes in heat to obtain the dihydrate, which is further heated to obtain the anhydrous form, and finally holmium(III) oxide is obtained.[1] It reacts with hydrochloric acid to obtain H[Ho(C2O4)2]·6H2O.[2]

References
  1. Wendlandt, W. W. (1959). "Thermal Decomposition of Rare Earth Metal Oxalates". Analytical Chemistry. 31 (3): 408–410. doi:10.1021/ac60147a024. ISSN 0003-2700.
  2. Moebius, R.; Matthes, F. (1964). "The exchange of oxalate ions for chloride ions of the oxalate hydrates of the rare earths and yttrium". Zeitschrift für Chemie. 4 (6): 234–235.
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