Skip to Main Content
Skip Nav Destination

Thermal decomposition kinetics of Fe-rich tourmaline

Liu Xiaowen, Yu Changqiang, Yang Weiqiang, Xie Lan and Liang Song
Thermal decomposition kinetics of Fe-rich tourmaline
European Journal of Mineralogy (June 2019) 31 (5-6): 919-928


The thermal behaviour of different types of tourmaline with varying Fe content has been reported in the literature, which makes comparison of analytical results difficult. The objective of this study was to throw light on the thermal behaviour and to carry out kinetics analysis for Fe-rich tourmaline (schorl). X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetry-Differential Scanning Calorimetry (TG-DSC) were applied to characterize the thermal behaviour. The Friedman, Flynn-Wall-Ozawa, modified Coats-Redfern and Kissinger integral approaches were carried out to determine the decomposition mechanism. The deprotonation reaction occurred at approximately 700 degrees C with the formation of oxy-tourmaline. Subsequently, oxy-tourmaline decomposition resulted in the formation of hematite, mullite and aluminium boron oxide at approximately 890 degrees C. Good linearity was observed using the Friedman, Flynn-Wall-Ozawa, modified Coats-Redfern and Kissinger integral approaches. The activation energy determined here was in the range 350-530 kJ mol (super -1) , which offered a simplified approach in understanding the thermal decomposition properties of Fe-rich tourmaline.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 31
Serial Issue: 5-6
Title: Thermal decomposition kinetics of Fe-rich tourmaline
Affiliation: Central South University, School of Minerals Processing and Bioengineering, Changsha, China
Pages: 919-928
Published: 20190625
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Germany
References: 71
Accession Number: 2019-063823
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201933
Close Modal

or Create an Account

Close Modal
Close Modal