Studies on the thermal decomposition of lanthanum(III) valerate and lanthanum(III) caproate in argon-Science-Chemical Encyclopedia-lookchem

Studies on the thermal decomposition of lanthanum(III) valerate and lanthanum(III) caproate in argon
Add time:07/22/2019 Source:sciencedirect.com

The decomposition of La-valerate (La(C4H9CO2)3·xH2O (x ≈ 0.45)) and La-caproate (La(C5H11CO2)3·xH2O (x ≈ 0.30)) was studied upon heating at 5 °C/min in a flow of argon. Using a variety of techniques including simultaneous TG-DTA, FTIR, X-ray diffraction with both laboratory Cu Kα and synchrotron sources as well as hot-stage microscopy, it was found that both compounds melt prior to decomposition and that the main decomposition stage from the molten, anhydrous state leads to the formation of La-dioxycarbonate (La2O2CO3) via an unstable intermediate product and release of symmetrical ketones. Final decomposition to La2O3 takes place with release of CO2.

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