The solid-state thermal decomposition of Sr3[La(C2O4)3(H2O)2]2•11H2O

被引：2

作者：

Deb, Nidhuban ^{[1
]}

机构：

[1] Deemed Univ, North Eastern Reg Inst Sci & Technol, Dept Chem, Itanagar 791109, Arunachal Prade, India

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2013年 / 114卷 / 01期

关键词：

Oxalato; IR; Thermal decomposition; TG/DTA/DSC; Kinetic parameters; Powder X-ray diffraction; BIMETALLIC OXALATE; BA; LANTHANUM(III); DEHYDRATION; PRECURSORS; CA; SR;

D O I：

10.1007/s10973-012-2855-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Strontium(II)diaquatris(oxalato)lanthanate(III)unidecahydrate, Sr-3[La(C2O4)(3)(H2O)(2)](2)center dot 11H(2)O, has been synthesized and characterized by elemental, IR and electronic spectral studies. Thermal studies (TG, DTG and DTA) in air showed that all the crystal and coordinated water molecules are removed at ca. 225 A degrees C. The final end product at 1,000 A degrees C was shown to be a mixture of mainly SrCO3, Sr3La4O9 and La2Sr2O5 along with oxides and carbides of both the metal, through the formation of an intermediate mixture of likely SrC2O4 and La-2(C2O4)(2.8) at 282 A degrees C, and SrCO3 and La2O(CO3)(2) at 540 A degrees C. The multi-step dehydration and decomposition of the compound has been explored from the DSC study in nitrogen up to 670 A degrees C, and the evaluated kinetic parameters are discussed.

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页码：261 / 267

页数：7

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