Thermal analysis of halotrichites

Frost, Ray L., Locke, Ashley J., & Martens, Wayde N. (2007) Thermal analysis of halotrichites. Thermochimica Acta, 459(1-2), pp. 64-72.

PDF (368Kb)

View at publisher

Abstract

Four halotrichites from different origins were analysed by thermogravimetric and differential thermogravimetric analysis. The halotrichites were analysed by powder X-ray diffraction and were phase pure. The chemical composition was analysed using EDX techniques. The formula of the halotrichite minerals were determined as halotrichite (Fe0.752+,Mg0.25)SO4.Al2(SO4)3.22H2O,apjohnite (Mn0.642+,Mg0.28,Zn0.08)SO4.Al2(SO4)3.22H2O, pickeringite (Fe0.222+,Mg0.78)SO4.Al2(SO4)3.22H2O, wupatkiite as (Co0.45,Fe0.552+)SO4.Al2(SO4)3.22H2O. Three low temperature decomposition steps a) between 0 and 44°C, 50 and 76°C, 72 and 88°C were attributed to dehydration. An additional dehydration step at around 317 to 330°C was confirmed by in-situ mass spectrometry. The higher temperature decomposition steps between 516 and 738°C are attributed to the decomposition of sulphate to sulphur dioxide and oxygen as confirmed by mass spectrometry. A comparison of the thermal decomposition of jarosites is made.

Citations:

7 times in Scopus

Search Google Scholar™

7 times in Web of Science

Citation countsare sourced monthly from Scopus and Web of Science citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

248 since deposited on 02 Jul 2007

38 in the past twelve months

Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

More statistics...

ID Code:	8361
Item Type:	Journal Article
Keywords:	evaporite, jarosite, halotrichite, sulphate, thermogravimetric analysis, Raman spectroscopy
DOI:	10.1016/j.tca.2007.04.015
ISSN:	0040-6031
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) > Structural Chemistry and Spectroscopy (030606) Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions:	Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner:	Copyright 2007 Elsevier
Copyright Statement:	Reproduced in accordance with the copyright policy of the publisher.
Deposited On:	02 Jul 2007
Last Modified:	29 Feb 2012 23:38

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page