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Thermal decomposition of natural iowaite

Frost, Ray L. & Erickson, Kristy L. (2004) Thermal decomposition of natural iowaite. Journal of Thermal Analysis and Calorimetry, 78(2), pp. 367-373.

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Abstract

The thermal decomposition of natural iowaite of formula Mg6Fe2(Cl,(CO3)0.5)(OH)16.4H2O was studied by using a combination of thermogravimetry and evolved gas mass spectrometry. Thermal decomposition occurs over a number of mass loss steps at 60 degrees Celsius attributed to dehydration, 266 degrees Celsius and 308 degrees Celsius assigned to dehydroxylation of ferric ions, at 551 degrees Celsius attributed to decarbonation and dehydroxylation, and 644, 703 and 761 degrees Celsius attributed to further dehydroxylation. The mass spectrum of carbon dioxide exhibits a maximum at 523 degrees Celsius. The use of TG coupled to MS shows the complexity of the thermal decomposition of iowaite.

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31 citations in Web of Science®

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342 since deposited on 11 Mar 2005
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ID Code: 823
Item Type: Journal Article
Keywords: hydrotalcite, iowaite, pyroaurite, Raman spectroscopy, infrared spectroscopy
DOI: 10.1023/B:JTAN.0000046103.00586.61
ISSN: 1572-8943
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2004 Springer Verlag
Copyright Statement: The original publication is available at SpringerLink.
Deposited On: 11 Mar 2005
Last Modified: 29 Feb 2012 23:08

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