An investigation on solid-state pyrolytic decomposition of barium trihemiaquatris(oxalato)lanthanate(III)decahydrate using TG–DTA in air and DSC in nitrogen

被引：0
作者：
Nidhuban Deb
机构：
[1] North Eastern Regional Institute of Science and Technology (Deemed University),Department of Chemistry
来源：
Journal of Thermal Analysis and Calorimetry | 2013年 / 112卷
关键词：
Oxalato; IR; Thermal studies; TG/DTA/DSC; Kinetic parameters; Powder X-ray diffraction;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A heterobimetallic oxalate coordination compound, barium(II)trihemiaquatris(oxalato)lanthanate(III)decahydrate, has been synthesized and characterized by elemental analysis, IR and electronic spectral studies. Crystalline nature of the compound with orthorhombic symmetry is corroborated from powder X-ray diffraction studies. The solid-state pyrolytic decomposition studies (TG, DTG and DTA) in air showed that the compound decomposed mainly to BaO, La2O3 and BaLa2O4 along with carbides of both the metal at ca. 1,000 °C through a number of intermediate steps. The DSC studies in nitrogen up to 670 °C found that the compound crumbled through several endothermic and one exothermic processes. The kinetic parameters, E*, lnko, ΔH# and ΔS# of dehydration and decomposition steps in nitrogen are evaluated from DSC peaks and discussed.
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页码：1415 / 1421
页数：6
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