Chemistry:Lithium oxalate
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| IUPAC name
Lithium oxalate
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| Properties | |
| Li 2C 2O 4 | |
| Molar mass | 101.90 g·mol−1 |
| Appearance | Colorless crystalline solid |
| Density | 2.12 g/cm3 |
| 6.6 g per 100 g of water | |
| Hazards | |
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| GHS Signal word | WARNING |
| H302, H312 | |
| P264, P270, P280, P301+312, P302+352, P312, P322, P330, P363, P501 | |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Tracking categories (test):
Lithium oxalate is an organic compound with the chemical formula Li
2C
2O
4. It is a salt of lithium metal and oxalic acid.[3][4] It consists of lithium cations Li+
and oxalate anions C
2O2−
4. Lithium oxalate is soluble in water and converts to lithium oxide when heated.[5]
Synthesis
One of the methods of synthesis is the reaction of direct neutralization of oxalic acid with lithium hydroxide:
- 2 LiOH + H
2C
2O
4 → Li
2C
2O
4 + 2 H
2O
Properties
The compound crystallizes in the monoclinic system, cell parameters a = 3.400 Å, b = 5.156 Å, c = 9.055 Å, β = 95.60°, Z = 4.[3]
Lithium oxalate decomposes when heated at 410–500 °C (770–932 °F; 683–773 K):
- Li
2C
2O
4 → Li
2CO
3 + CO
Applications
In pyrotechnics, the compound is used to color the flame red.[6]
References
- ↑ "553-91-3 | Sigma-Aldrich". Sigma Aldrich. https://www.sigmaaldrich.com/RU/ru/search/553-91-3?focus=products&page=1&perPage=30&sort=relevance&term=553-91-3&type=cas_number.
- ↑ "di-Lithium oxalate". Merck Millipore. https://www.merckmillipore.com/RU/ru/product/di-Lithium-oxalate,MDA_CHEM-822085?ReferrerURL=https%3A%2F%2Fwww.google.ru%2F.
- ↑ 3.0 3.1 Beagley, B.; Small, R. W. H. (1964-06-10). "The structure of lithium oxalate" (in en). Acta Crystallographica 17 (6): 783–788. doi:10.1107/S0365110X64002079. https://scripts.iucr.org/cgi-bin/paper?a04249. Retrieved 15 June 2021.
- ↑ Solchenbach, Sophie; Wetjen, Morten; Pritzl, Daniel; Schwenke, K. Uta; Gasteiger, Hubert A. (2018). "Lithium Oxalate as Capacity and Cycle-Life Enhancer in LNMO/Graphite and LNMO/SiG Full Cells" (in en). Journal of the Electrochemical Society 165 (3): A512–A524. doi:10.1149/2.0611803jes. https://iopscience.iop.org/article/10.1149/2.0611803jes. Retrieved 15 June 2021.
- ↑ "Lithium Oxalate" (in en). Millipore-Sigma. https://www.emdmillipore.com/CA/en/product/di-Lithium-oxalate,MDA_CHEM-822085.
- ↑ Koch, Ernst-Christian (2009). "Is it possible to Obtain a Deep Red Pyrotechnic Flame Based on Lithium?". 36th International Pyrotechnics Seminar. doi:10.13140/2.1.1657.0567. https://www.researchgate.net/publication/268211790. Retrieved 15 June 2021.
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