Chemistry:Praseodymium(III) oxalate
From HandWiki
| Names | |
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| Other names
Praseodymium oxalate, Tris(oxalato(2-))dipraseodymium
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
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PubChem CID
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| Properties | |
| C6O12Pr2 | |
| Molar mass | 545.87 |
| Appearance | Light green crystals |
| 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 | |
Other cations
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Barium oxalate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Praseodymium(III) oxalate is an inorganic compound, a salt of praseodymium metal and oxalic acid with the chemical formula C6O12Pr2.[1] The compound forms light green crystals, insoluble in water, also forms crystalline hydrates.
Synthesis
The reaction of soluble praseodymium salts with oxalic acid:
- [math]\displaystyle{ \mathsf{2Pr(NO_3)_3 + 3(COOH)_2 \ \xrightarrow{}\ Pr_2(C_2O_4)_3\downarrow + 6HNO_3 } }[/math]
Properties
Praseodymium oxalate forms light green crystals. It is poorly soluble in water.
The compound forms crystalline hydrates (light green crystals): Pr2(C2O4)3•10H2O.
The crystalline hydrate decomposes stepwise when heated:[2][3]
- [math]\displaystyle{ \mathsf{Pr_2(C_2O_4)_3\cdot 10H_2O \ \xrightarrow[-H_2O]{T}\ Pr_2(C_2O_4)_3 \ \xrightarrow{T}\ Pr_2O(CO_3)_2 \ \xrightarrow{T}\ Pr_2O_2CO_3 \ \xrightarrow{800^oC}\ Pr_6O_{11} } }[/math]
Uses
The compound is used as an intermediate product in the synthesis of praseodymium. It is also applied to colour some glasses and enamels. If mixed with certain other materials, the compound paints glass intense yellow.[4]
References
- ↑ "Praseodymium oxalate" (in en). National Institute of Standards and Technology. https://webbook.nist.gov/cgi/inchi?ID=B6000077&Mask=80.
- ↑ Hussein, Gamal A.M. (1994-06-01). "Formation of praseodymium oxide from the thermal decomposition of hydrated praseodymium acetate and oxalate" (in en). Journal of Analytical and Applied Pyrolysis 29: 89–102. doi:10.1016/0165-2370(93)00782-I. https://www.sciencedirect.com/science/article/abs/pii/016523709300782I. Retrieved 17 June 2021.
- ↑ Lv, Peng; Zhang, Liangjing; Koppala, Sivasankar; Chen, Kaihua; He, Yuan; Li, Shiwei; Yin, Shaohua (2020-09-01). "Decomposition Study of Praseodymium Oxalate as a Precursor for Praseodymium Oxide in the Microwave Field". ACS Omega 5 (34): 21338–21344. doi:10.1021/acsomega.0c00505. PMID 32905250.
- ↑ "Praseodymium Oxalate 99%-99.999% from Metall Rare Earth Limited". metall.com.cn. http://www.metall.com.cn/prox.htm.
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