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Thermal analysis of beaverite in comparison with plumbojarosite

Frost, Ray L., Locke, Ashley J., & Martens, Wayde N. (2008) Thermal analysis of beaverite in comparison with plumbojarosite. Journal of Thermal Analysis and Calorimetry, 92(3), pp. 887-892.

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Abstract

The thermal decomposition of beaverite and plumbojarosite was studied using a combination of thermogravimetric analysis coupled to a mass spectrometer. The mineral beaverite Pb(Fe,Cu)3(SO4)2(OH)6 decomposes in three stages attributed to dehydroxylation, loss of sulphate and loss of oxygen, which take place at 376 and 420, 539 and 844 degrees Celsius. In comparison three thermal decomposition steps are observed for plumbojarosite PbFe6(SO4)4(OH)12 at 376, 420 and 502 degrees Celsius attributed to dehydroxylation; loss of sulphate occurs at 599 degrees Celsius; and loss of oxygen and formation of lead occurs at 844 and 953 degrees Celsius. The temperatures of the thermal decomposition of the natural plumbojarosite were found to be less than that for the synthetic jarosite. A comparison of the thermal decomposition of plumbojarosite with argentojarosite is made. The understanding of the chemistry of the thermal decomposition of minerals such as beaverite, argentojarosite and plumbojarosite and related minerals is of vital importance in the study known as 'archeochemistry'.

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12 citations in Web of Science®

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ID Code: 13514
Item Type: Journal Article
Additional URLs:
Keywords: argentojarosite, beaverite, plumbojarosite, dehydration, dehydroxylation, thermogravimetric analysis
DOI: 10.1007/s10973-007-8702-7
ISSN: 1572-8943
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200) > Solid State Chemistry (030206)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2008 Springer
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 08 May 2008
Last Modified: 29 Feb 2012 23:46

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