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Studies on solid-state decomposition of calcium tetraaquatris(oxalato)lanthanate(III)pentahydrate using DTA–TG in air and DSC in nitrogen

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Abstract

Heterobimetallic oxalate complex precursor, Ca3[La(C2O4)3(H2O)4]2·5H2O (CaOLa) was synthesized in aqueous medium and characterized by elemental analysis, IR, electronic spectral, and powder X-ray diffraction studies. It is found to be fined crystalline in nature with triclinic symmetry. Thermal studies (TG, DTG, and DTA) in air showed that the departure of aqua ligands completed at ca. 240 °C. A mixture of mainly CaO, La2O3, and La2CaO x along with a trace of carbides of calcium and lanthanum were identified in the end products at 1,000 °C. The nature of decomposition in nitrogen was explored from DSC study and discussed the evaluated kinetic parameters.

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  1. Department of Chemistry, North Eastern Regional Institute of Science and Technology (Deemed University), Nirjuli, Itanagar, 791109, Arunachal Pradesh, India

    Nidhuban Deb

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Deb, N. Studies on solid-state decomposition of calcium tetraaquatris(oxalato)lanthanate(III)pentahydrate using DTA–TG in air and DSC in nitrogen. J Therm Anal Calorim 111, 997–1002 (2013). https://doi.org/10.1007/s10973-012-2427-y

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  • DOI: https://doi.org/10.1007/s10973-012-2427-y

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