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[edit]

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[edit]

^ 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. The exchange of oxalate ions for chloride ions of the oxalate hydrates of the rare earths and yttrium. Zeitschrift fuer Chemie, 1964. 4 (6): 234-235. ISSN: 0044-2402.

[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. The exchange of oxalate ions for chloride ions of the oxalate hydrates of the rare earths and yttrium. Zeitschrift fuer Chemie, 1964. 4 (6): 234-235. ISSN: 0044-2402.

[1]

[2]