Authors:
A. Smallwood University of Technology Sydney Department of Chemistry, Materials and Forensic Sciences P.O. Box 123 Broadway Sydney NSW 20007 Australia

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P. Thomas University of Technology Sydney Department of Chemistry, Materials and Forensic Sciences P.O. Box 123 Broadway Sydney NSW 20007 Australia

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A. Ray University of Technology Sydney Department of Chemistry, Materials and Forensic Sciences P.O. Box 123 Broadway Sydney NSW 20007 Australia

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P. Šimon Slovak University of Technology Institute Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology Radlinského 9 812 37 Bratislava Slovak Republic

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Abstract  

A model developed for the estimation of the diffusion coefficient based on Fickian diffusion is applied to the dehydration of a Coober Pedy white play of colour (precious) opal using thermogravimetric analysis (TG). The model was originally applied to bulk and powdered opal (opal with no bulk). In this paper the opal was graded prior to TG analysis. The diffusion coefficient was calculated and is reported up to the critical point of water.

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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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