Samarium(III) oxalate is an inorganic compound, a salt of samarium and oxalic acid with the formula Sm2(C2O4)3.[1] The compound does not dissolve in water, forms a crystalline hydrate with yellow crystals.[2]

Samarium(III) oxalate
Names
Other names
Tris(oxalato)disamarium, Samarium oxalate,
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 221-844-8
  • InChI=1S/3C2H2O4.2Sm/c3*3-1(4)2(5)6;;/h3*(H,3,4)(H,5,6);;/q;;;2*+3/p-6
    Key: DABIZUXUJGHLMW-UHFFFAOYSA-H
  • C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].C(=O)(C(=O)[O-])[O-].[Sm+3].[Sm+3]
Properties
C6O12Sm2
Molar mass 564.77 g·mol−1
Appearance Yellow crystals
Insoluble
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H312
P264, P270, P280, P301+P312, P302+P352, P312, P322, P330, P363, P501
Related compounds
Related compounds
Praseodymium oxalate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Synthesis

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Precipitation of soluble samarium salts with oxalic acid:[3]

 

Also a reaction of samarium nitrate and oxalic acid in an aqueous solution:

 

Physical properties

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Samarium(III) oxalate forms a crystalline hydrate of the composition Sm2(C2O4)3 • 10H2O with yellow crystals.

Chemical properties

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Decomposes on heating:[4]

 

Crystalline hydrate Sm2(C2O4)3 • 10H2O decomposes stepwise.[5]

References

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  1. ^ Bulletin of the Research Council of Israel: Chemistry. Section A. Weizmann Science Press of Israel. 1959. p. 174. Retrieved 8 August 2021.
  2. ^ "Samarium(III) oxalate hydrate ≥99.99% | Sigma-Aldrich". Sigma Aldrich. Retrieved 8 August 2021.
  3. ^ Sanuki, Sumiko; Sugiyama, Akio; Tunekawa, Minoru; Kadomachi, Kiyotaka; Arai, Koichi (1994). "Precipitation Stripping of Samarium Oxalate from Organic Solution Containing Acid Type Extractant by Oxalic Acid". Journal of the Japan Institute of Metals. 58 (11): 1271–1278. doi:10.2320/jinstmet1952.58.11_1271. Retrieved 8 August 2021.
  4. ^ Wendlandt, W. W. (1 March 1959). "Thermal Decomposition of Rare Earth Metal Oxalates". Analytical Chemistry. 31 (3): 408–410. doi:10.1021/ac60147a024. ISSN 0003-2700. Retrieved 8 August 2021.
  5. ^ Hussein, G.A.M.; Buttrey, D.J.; Desanto, P.; Abd-Elgaber, A.A.; Roshdy, Heba; Myhoub, Ali Y.Z. (3 June 2003). "Formation and characterization of samarium oxide generated from different precursors". Thermochimica Acta. 402 (1–2): 27–36. doi:10.1016/S0040-6031(02)00535-X. ISSN 0040-6031. Retrieved 8 August 2021.