Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 89: Issue 2
Thermal decomposition of [Cd(NH3)6](NO3)2
Authors:
E. Mikuli Jagiellonian University Department of Chemical Physics, Faculty of Chemistry Ingardena 3 30-060 Cracow Poland

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M. Liszka Jagiellonian University Department of Chemical Physics, Faculty of Chemistry Ingardena 3 30-060 Cracow Poland

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M. Molenda Jagiellonian University Department of Chemical Technology, Faculty of Chemistry Ingardena 3 30-060 Cracow Poland

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Pages:
573–578
Online Publication Date:
20 Oct 2006
Publication Date:
01 Aug 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-006-7610-6
Keywords:
DSC; EGA; hexaamminecadmium(II) nitrate(V); SDTA; TG; thermal decomposition
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Abstract  

Thermal decomposition of [Cd(NH3)6](NO3)2 was studied by thermogravimetry (TG) with simultaneous differential thermal analysis (SDTA) for two samples and at two different sets of measurement parameters. The gaseous products of the decomposition were on-line identified by evolved gas analysis (EGA) with a quadruple mass spectrometer (QMS). The decomposition of the title compound proceeds, for both cases, in the three main stages. In the first stage, deammination of [Cd(NH3)6](NO3)2 to [Cd(NH3)](NO3)2 undergoes by three steps and 5/6 of all NH3 molecules are liberated. At second stage the liberation of residual 1/6NH3 molecules and the formation of Cd(NO3)2 undergoes. However, during this process simultaneously a two-step oxidation of a part of ammonia molecules also takes place. In a first step as a result a mixture of ammonia, water vapour and nitrogen is formatted. At the second step, subsequent oxidation of a next part of NH3 molecules undergoes. As a result, a mixture of nitrogen oxide, nitrogen and water vapour is formatted, what for these both steps clearly indicates the EGA analysis. The third stage of the thermal decomposition is connected with the melting and subsequent decomposition of residual Cd(NO3)2 to oxygen, nitrogen dioxide and solid CdO. Additionally, third sample was measured by differential scanning calorimetry (DSC) and the results are fully consistent with those obtained by TG.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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