Thermoanalytical studies of natural potassium, sodium and ammonium alunites
Data(s) |
01/05/2010
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Resumo |
Dynamic and controlled rate thermal analysis (CRTA) has been used to characterise alunites of formula [M(Al)3(SO4)2(OH)6 ] where M+ is the cations K+, Na+ or NH4+. Thermal decomposition occurs in a series of steps. (a) dehydration, (b) well defined dehydroxylation and (c) desulphation. CRTA offers a better resolution and a more detailed interpretation of water formation processes via approaching equilibrium conditions of decomposition through the elimination of the slow transfer of heat to the sample as a controlling parameter on the process of decomposition. Constant-rate decomposition processes of water formation reveal the subtle nature of dehydration and dehydroxylation. |
Formato |
application/pdf |
Identificador | |
Publicador |
Akadémiai Kiadó/Springer Science+Business Media B.V. |
Relação |
http://eprints.qut.edu.au/32437/1/c32437.pdf DOI:10.1007/s10973-009-0581-7 Frost, Ray L., Kristof, Janos, Palmer, Sara J., Horvath, Erzsebet, & Jakub, Emma (2010) Thermoanalytical studies of natural potassium, sodium and ammonium alunites. Journal of Thermal Analysis and Calorimetry, 100(3), pp. 961-966. |
Direitos |
Copyright 2010 Akadémiai Kiadó/Springer Science+Business Media B.V. The original publication is available at www.springerlink.com |
Fonte |
Chemistry; Faculty of Science and Technology |
Palavras-Chave | #030600 PHYSICAL CHEMISTRY (INCL. STRUCTURAL) #030603 Colloid and Surface Chemistry #030606 Structural Chemistry and Spectroscopy #030602 Chemical Thermodynamics and Energetics #alunite, thermal analysis, controlled rate thermal analysis, dehydration, dehydroxylation |
Tipo |
Journal Article |