Thermal decomposition of Ln(C2H5CO2)3.H2O (Ln = Ho, Er, Tm and Yb)
Identifieur interne : 000116 ( Pascal/Curation ); précédent : 000115; suivant : 000117Thermal decomposition of Ln(C2H5CO2)3.H2O (Ln = Ho, Er, Tm and Yb)
Auteurs : J.-C. Grivel [Danemark]Source :
- Journal of thermal analysis and calorimetry [ 1388-6150 ] ; 2012.
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Abstract
The thermal decomposition of Ho(III), Er(III), Tm(III) and Yb(Ill) propionate monohydrates in argon was studied by means of thermogravimetry (TG), differential thermal analysis (DTA), IR-spectroscopy and X-ray diffraction (XRD). Dehydration takes place around 90 °C. It is followed by the decomposition of the anhydrous propionates to Ln2O2CO3 (Ln = Ho, Er, Tm or Yb) with the evolution of CO2 and 3-pentanone (C2H5COC2H5) between 300 and 400 °C. The further decomposition of Ln2O2CO3 to the respective sesquioxides Ln2O3 is characterized by an intermediate plateau extending from approximately 500-700 °C in the TG traces. This stage corresponds to an overall composition of Ln2O2.5(CO3)0.5 but is more probably a mixture of Ln2O2CO3 and Ln2O3. The stability of this intermediate state decreases for the lighter rare-earth (RE) compounds studied. Full conversion to Ln2O3 is achieved at about 1,100 °C. The overall thermal decomposition behaviour of the title compounds is similar to that previously reported for Lu(C2H5CO2)3.H2O.
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Grivel</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark</s1><s2>4000 Roskild</s2><s3>DNK</s3><sZ>1 aut.</sZ></inist:fA14><country>Danemark</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">13-0020812</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 13-0020812 INIST</idno><idno type="RBID">Pascal:13-0020812</idno><idno type="wicri:Area/Pascal/Corpus">000116</idno><idno type="wicri:Area/Pascal/Curation">000116</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Thermal decomposition of Ln(C<sub>2</sub>H<sub>5</sub>CO<sub>2</sub>)<sub>3</sub>.H<sub>2</sub>O (Ln = Ho, Er, Tm and Yb)</title><author><name sortKey="Grivel, J C" sort="Grivel, J C" uniqKey="Grivel J" first="J.-C." last="Grivel">J.-C. Grivel</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark</s1><s2>4000 Roskild</s2><s3>DNK</s3><sZ>1 aut.</sZ></inist:fA14><country>Danemark</country></affiliation></author></analytic><series><title level="j" type="main">Journal of thermal analysis and calorimetry</title><title level="j" type="abbreviated">J. therm. anal. calorim.</title><idno type="ISSN">1388-6150</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of thermal analysis and calorimetry</title><title level="j" type="abbreviated">J. therm. anal. calorim.</title><idno type="ISSN">1388-6150</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carboxylate</term><term>Differential thermal analysis</term><term>Erbium Compounds</term><term>Fourier transformation</term><term>Holmium Compounds</term><term>Infrared spectrometry</term><term>Lanthanide Compounds</term><term>Pyrolysis</term><term>Thermal analysis</term><term>Thermogravimetry</term><term>Thulium Compounds</term><term>X ray diffraction</term><term>Ytterbium Compounds</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Pyrolyse</term><term>Lanthanide Composé</term><term>Holmium Composé</term><term>Erbium Composé</term><term>Thulium Composé</term><term>Ytterbium Composé</term><term>Analyse thermique différentielle</term><term>Thermogravimétrie</term><term>Diffraction RX</term><term>Carboxylate</term><term>Spectrométrie IR</term><term>Analyse thermique</term><term>Transformation Fourier</term><term>Propionate</term><term>FT IR</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The thermal decomposition of Ho(III), Er(III), Tm(III) and Yb(Ill) propionate monohydrates in argon was studied by means of thermogravimetry (TG), differential thermal analysis (DTA), IR-spectroscopy and X-ray diffraction (XRD). Dehydration takes place around 90 °C. It is followed by the decomposition of the anhydrous propionates to Ln<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> (Ln = Ho, Er, Tm or Yb) with the evolution of CO<sub>2</sub> and 3-pentanone (C<sub>2</sub>H<sub>5</sub>COC<sub>2</sub>H<sub>5</sub>) between 300 and 400 °C. The further decomposition of Ln<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> to the respective sesquioxides Ln<sub>2</sub>O<sub>3</sub> is characterized by an intermediate plateau extending from approximately 500-700 °C in the TG traces. This stage corresponds to an overall composition of Ln<sub>2</sub>O<sub>2.5</sub>(CO<sub>3</sub>)<sub>0.5</sub> but is more probably a mixture of Ln<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> and Ln<sub>2</sub>O<sub>3</sub>. The stability of this intermediate state decreases for the lighter rare-earth (RE) compounds studied. Full conversion to Ln<sub>2</sub>O<sub>3</sub> is achieved at about 1,100 °C. The overall thermal decomposition behaviour of the title compounds is similar to that previously reported for Lu(C<sub>2</sub>H<sub>5</sub>CO<sub>2</sub>)<sub>3</sub>.H<sub>2</sub>O.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>1388-6150</s0></fA01><fA03 i2="1"><s0>J. therm. anal. calorim.</s0></fA03><fA05><s2>109</s2></fA05><fA06><s2>1</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Thermal decomposition of Ln(C<sub>2</sub>H<sub>5</sub>CO<sub>2</sub>)<sub>3</sub>.H<sub>2</sub>O (Ln = Ho, Er, Tm and Yb)</s1></fA08><fA11 i1="01" i2="1"><s1>GRIVEL (J.-C.)</s1></fA11><fA14 i1="01"><s1>Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark</s1><s2>4000 Roskild</s2><s3>DNK</s3><sZ>1 aut.</sZ></fA14><fA20><s1>81-88</s1></fA20><fA21><s1>2012</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>6367</s2><s5>354000507983970120</s5></fA43><fA44><s0>0000</s0><s1>© 2013 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>41 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>13-0020812</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Journal of thermal analysis and calorimetry</s0></fA64><fA66 i1="01"><s0>NLD</s0></fA66><fC01 i1="01" l="ENG"><s0>The thermal decomposition of Ho(III), Er(III), Tm(III) and Yb(Ill) propionate monohydrates in argon was studied by means of thermogravimetry (TG), differential thermal analysis (DTA), IR-spectroscopy and X-ray diffraction (XRD). Dehydration takes place around 90 °C. It is followed by the decomposition of the anhydrous propionates to Ln<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> (Ln = Ho, Er, Tm or Yb) with the evolution of CO<sub>2</sub> and 3-pentanone (C<sub>2</sub>H<sub>5</sub>COC<sub>2</sub>H<sub>5</sub>) between 300 and 400 °C. The further decomposition of Ln<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> to the respective sesquioxides Ln<sub>2</sub>O<sub>3</sub> is characterized by an intermediate plateau extending from approximately 500-700 °C in the TG traces. This stage corresponds to an overall composition of Ln<sub>2</sub>O<sub>2.5</sub>(CO<sub>3</sub>)<sub>0.5</sub> but is more probably a mixture of Ln<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> and Ln<sub>2</sub>O<sub>3</sub>. The stability of this intermediate state decreases for the lighter rare-earth (RE) compounds studied. Full conversion to Ln<sub>2</sub>O<sub>3</sub> is achieved at about 1,100 °C. 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