Chemistry:Samarium(III) oxalate
From HandWiki
| Names | |
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| Other names
Tris(oxalato)disamarium, Samarium oxalate,
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
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PubChem CID
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| Properties | |
| C6O12Sm2 | |
| Molar mass | 564.77 g·mol−1 |
| Appearance | Yellow crystals |
| Insoluble | |
| Hazards | |
| GHS pictograms | 
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| GHS Signal word | Warning |
| H302, H312 | |
| P264, P270, P280, P301+312, P302+352, P312, P322, P330, P363, P501 | |
| Related compounds | |
Related compounds
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Praseodymium oxalate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
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]
Synthesis
Precipitation of soluble samarium salts with oxalic acid:[3]
- [math]\displaystyle{ \mathsf{ 2SmCl_3 + 3H_2C_2O_4 \ \xrightarrow{}\ Sm_2(C_2O_4)_3\downarrow + 6HCl } }[/math]
Also a reaction of samarium nitrate and oxalic acid in an aqueous solution:
- [math]\displaystyle{ \mathsf{ 2Sm(NO_3)_3 + 3H_2C_2O_4 \ \xrightarrow{}\ Sm_2(C_2O_4)_3\downarrow + 6HNO_3 } }[/math]
Physical properties
Samarium(III) oxalate forms a crystalline hydrate of the composition Sm2(C2O4)3 • 10H2O with yellow crystals.
Chemical properties
Decomposes on heating:[4]
- [math]\displaystyle{ \mathsf{ Sm_2(C_2O_4)_3 \ \xrightarrow{800^oC}\ Sm_2O_3 + 3CO_2 + 3CO } }[/math]
Crystalline hydrate Sm2(C2O4)3 • 10H2O decomposes stepwise.[5]
References
- ↑ (in en) Bulletin of the Research Council of Israel: Chemistry. Section A. Weizmann Science Press of Israel. 1959. p. 174. https://books.google.com/books?id=OAI5AAAAIAAJ&q=samarium+oxalate. Retrieved 8 August 2021.
- ↑ "Samarium(III) oxalate hydrate ≥99.99% | Sigma-Aldrich" (in en). Sigma Aldrich. https://www.sigmaaldrich.com/RU/ru/product/aldrich/463825.
- ↑ 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. https://www.jstage.jst.go.jp/article/jinstmet1952/58/11/58_11_1271/_article. Retrieved 8 August 2021.
- ↑ 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. https://pubs.acs.org/doi/abs/10.1021/ac60147a024. Retrieved 8 August 2021.
- ↑ 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" (in en). Thermochimica Acta 402 (1–2): 27–36. doi:10.1016/S0040-6031(02)00535-X. ISSN 0040-6031. https://www.sciencedirect.com/science/article/abs/pii/S004060310200535X. Retrieved 8 August 2021.
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