Promethium(III) oxalate

Promethium(III) oxalate is an oxalate of promethium, with the chemical formula Pm₂(C₂O₄)₃. Its decahydrate crystallizes in the monoclinic crystal system with space group P2₁/m.^[1] Promethium(III) oxalate trihydrate can decompose into stable basic carbonate Pm₂O₂CO₃,^[2] and generate promethium(III) oxide at higher temperatures.^[3]

Promethium(III) oxalate

Identifiers
CAS Number	10561-77-0 anhydrous Y 25880-55-1 trihydrate Y 14462-37-4 decahydrate Y
3D model (JSmol)	Interactive image
PubChem CID	129763196
InChI InChI=1S/3C2H2O4.2Pm/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);; Key: BMANRDKXKZELGM-UHFFFAOYSA-N
SMILES C(=O)(C(=O)O)O.C(=O)(C(=O)O)O.C(=O)(C(=O)O)O.[Pm].[Pm]
Properties
Chemical formula	Pm2(C2O4)3
Molar mass	559.93
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

In all lanthanide oxalates, promethium(III) oxalate has the lowest solubility.^[4]

References

1. Weigel, F.; Ollendorff, W.; Scherer, V.; Hagenbruch, R. (Jun 1966). "Strukturuntersuchungen an Lanthanidenoxalaten. I. Einkristalluntersuchungen an Neodym(III)-oxalatdekahydrat und Samarium(III)-oxalatdekahydrat. Die Elementarzelle von Promethium(III)-oxalatdekahydrat". Zeitschrift für anorganische und allgemeine Chemie. 345 (1–2): 119–128. doi:10.1002/zaac.19663450114. ISSN 0044-2313.
2. McNeilly, C. E.; Roberts, F. P. Thermal analysis of promethium oxalate. Therm. Anal., Proc. Int. Conf., 2nd, 1969 (2): 727-738. CODEN: 21RQA2.
3. Archie S. Wilson, F. P. Roberts, E. J. Wheelwright (May 1963). "Promethium Oxide Structure". Nature. 198 (4880): 580. Bibcode:1963Natur.198..580W. doi:10.1038/198580a0. ISSN 0028-0836. Retrieved 2020-10-08.{{cite journal}}: CS1 maint: multiple names: authors list (link)
4. Lavrukhina, Avgusta Konstantinovna; Pozdnyakov, Aleksandr Aleksandrovich (1966). Аналитическая химия технеция, прометия, астатина и франция (Analytical Chemistry of Technetium, Promethium, Astatine, and Francium) (in Russian). Nauka. p. 123.