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Lithium oxalate
Chemical compound From Wikipedia, the free encyclopedia
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Lithium oxalate is an organic compound with the chemical formula Li2C2O4. It is a salt of lithium metal and oxalic acid.[3][4] It consists of lithium cations Li+ and oxalate anions C2O2−4. Lithium oxalate is soluble in water and converts to lithium oxide when heated.[5]
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Synthesis
One of the methods of synthesis is the reaction of direct neutralization of oxalic acid with lithium hydroxide:
- 2 LiOH + H2C2O4 → Li2C2O4 + 2 H2O
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):
- Li2C2O4 → Li2CO3 + CO
Applications
In pyrotechnics, the compound is used to color the flame red.[6]
References
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