Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 90: Issue 2
Structural and thermal studies on the solid products in the system MnSeO3-SeO2-H2O
Authors:
L. Vlaev Assen Zlatarov University Department of Physical Chemistry 8010 Bourgas Bulgaria

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Mariana Tavlieva Assen Zlatarov University Department of Physical Chemistry 8010 Bourgas Bulgaria

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Pages:
385–392
Online Publication Date:
11 Jul 2007
Publication Date:
01 Nov 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-007-7748-x
Keywords:
hydrothermal synthesis; IR spectroscopy; manganese(II) selenites; non-isothermal kinetic; powder X-ray diffraction; solubility diagrams; thermal analyses
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Abstract  

The solubility of MnSeO3-SeO2-H2O system was studied in the temperature region 25–300°C. The compounds of the three-component system were identified by the Schreinemaker’s method. The phase diagram of manganese(II) selenites was drawn and the crystallization fields for the different phases were determined. Depending on the conditions for hydrothermal synthesis, MnSeO3·H2O, MnSeO3·3/4H2O, MnSeO3·l/3H2O and MnSe2O5 were obtained. The different phases were proven and characterized by chemical, powder X-ray diffraction and thermal analyses, as well as IR spectroscopy. The kinetics of dehydration and decomposition of MnSeO3·H2O was studied under non-isothermal heating. Based on 4 calculation procedures and 27 kinetic equations, the values of activation energy and pre-exponential factor in Arrhenius equation were calculated for both processes.

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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

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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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