Holmium(III) oxalate

Holmium(III) oxalate
Identifiers
CAS Number	3269-15-6 ;
3D model (JSmol)	Interactive image; dihydrate: Interactive image; decahydrate: Interactive image;
CompTox Dashboard (EPA)	DTXSID80954375 ;
	InChI InChI=1S/3C2H2O4.2Ho/c33-1(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/c33-1(4)2(5)6;;;;/h3(H,3,4)(H,5,6);;;21H2/q;;;2+3;;/p-6 Key: MIBITVHERFMSTH-UHFFFAOYSA-H; decahydrate: InChI=1S/3C2H2O4.2Ho.10H2O/c33-1(4)2(5)6;;;;;;;;;;;;/h3(H,3,4)(H,5,6);;;101H2/q;;;2*+3;;;;;;;;;;/p-6 Key: OKKLEXNPKBZYQY-UHFFFAOYSA-H;
	SMILES [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
Chemical formula	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

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

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

^ Wendlandt, W. W. (1959). "Thermal Decomposition of Rare Earth Metal Oxalates". Analytical Chemistry. 31 (3): 408–410. doi:10.1021/ac60147a024. ISSN 0003-2700.
^ 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.

[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.

[1]

[2]