Thermal decomposition behaviour of lanthanum(III) tris-tartrato lanthanate(III) decahydrate

被引：21

作者：

Deb, N ^{[1
]}

机构：

[1] NE Reg Inst Sci & Technol, Dept Chem, Itanagar 791109, Arunachal Prade, India

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2004年 / 78卷 / 01期

关键词：

IR; lanthanum tartrato complex; thermal decomposition; X-ray powder diffraction;

D O I：

10.1023/B:JTAN.0000042170.86978.b5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Lanthanum(III) tris-tartrato lanthanate(III) decahydrate, La[ La(C4H4O6)(3)]. 10H(2)O has been synthesized and characterized by elemental analysis, IR, electronic spectral and X-ray powder diffraction studies. Thermal studies (TG, DTG and DTA) in air showed a complex decomposition pattern with the generation of an anhydrous species at similar to170degreesC. The end product was found to be mainly a mixture of La2O3 and carbides at similar to970degreesC through the formation of several intermediates at different temperature. The residual product in DSC study in nitrogen at 670 degreesC is assumed to be a similar mixture generated at 500 degreesC in TG in air. Kinetic parameters, such as, E*,DeltaH,DeltaS, etc. obtained from DSC are discussed. IR and X-ray powder diffraction studies identified some of the decomposition products. The tentative mechanism for the thermal decomposition in air of the compound is proposed.

引用

页码：227 / 237

页数：11

共 30 条

[1] A MOSSBAUER STUDY OF THERMAL DECOMPOSITION OF POTASSIUM TRIS(OXALATO)FERRATE(3) [J].

BANCROFT, GM ;

DHARMAWA.KG ;

MADDOCK, AG .

INORGANIC CHEMISTRY, 1970, 9 (02) :223-&

[2]

BASSI PS, 1992, INDIAN J CHEM A, V31, P596

[3]

Bently F.F., 1968, INFRARED SPECTRA CHA

[4] TRIPLET STATE OF A BINUCLEAR COPPER DL-TARTRATE AND ELECTRON PARAMAGNETIC RESONANCE SPECTRA OF COPPER TARTRATES [J].

CHASTEEN, ND ;

BELFORD, RL .

INORGANIC CHEMISTRY, 1970, 9 (01) :169-&

[5] Synthesis, characterization and the thermal decomposition of lithium tris(oxalato)lanthanum(III)nonahydrate and sodium tris(oxalato)lanthanum(III)octahydrate [J].

Deb, N ;

Baruah, SD ;

Dass, NN .

THERMOCHIMICA ACTA, 1999, 326 (1-2) :43-52

[6] SYNTHESIS AND THERMAL-DECOMPOSITION OF COBALT(II) BIS(OXALATO)COBALTATE(II) TETRAHYDRATE [J].

DEB, N ;

GOGOI, PK ;

DASS, NN .

JOURNAL OF THERMAL ANALYSIS, 1989, 35 (01) :27-34

[7] Synthesis, characterization and thermal investigation of M[M(C2O4)3]•xH2O -: (x = 4 for M = Cr(III); x = 2 for M = Sb(III) and x = 9 for M = La(III)) [J].

Deb, N ;

Baruah, SD ;

Sen Sarma, N ;

Dass, NN .

THERMOCHIMICA ACTA, 1998, 320 (1-2) :53-67

[8] Synthesis, characterization and the thermal decomposition of potassium tris(oxalato)lanthanum(III)nonahydrate [J].

Deb, N .

THERMOCHIMICA ACTA, 1999, 338 (1-2) :27-33

[9] Synthesis, characterization and thermal decomposition kinetics of barium(II)bis(oxalato)barium(II)dihydrate and lead(II)bis(oxalato)lead(II)monohydrate [J].

Deb, N ;

Baruah, SD ;

Sen Sarma, N ;

Dass, NN .

THERMOCHIMICA ACTA, 1999, 329 (02) :129-139

[10] Thermal investigations of M[La(C2O4)3]•xH2O (M=Cr(III) and Co(III)) [J].

Deb, N .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2002, 67 (03) :699-712

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