Journal of Thermal Analysis and Calorimetry

, Volume 96, Issue 1, pp 147–154 | Cite as

Stages of thermal decomposition of sodium oxo-salts of sulphur

Regular Papers Material Sciences


Thermal behaviour of sodium oxo-salts of sulphur: Na2SO4, Na2S2O7, Na2S2O6, Na2SO3, Na2S2O5, Na2S2O4, Na2S2O3, Na2S3O6 and of sulphides Na2S and Na2S2 was studied on heating up to 1000°C. The experiments were performed with anhydrous compounds obtained from commercial products by recrystallisation and dehydration. The stage mechanisms of decomposition of anionic sub-lattices of the salts have been proposed basing on the Górski’s morphological classification of simple species. The thermal stability and the stage decomposition mechanisms were correlated with the structure and the potential chemical properties of the salt anions. The thermal decomposition processes were studied by means of thermal analysis, and the decomposition products were identified by means of X-ray phase analysis.


elementary transformations Górski’s morphological classification sodium oxo-salts thermal decomposition mechanism 


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  1. 1.Department of ChemistryWarsaw University of TechnologyWarsawPoland

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