Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/13310
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Thermal decomposition and X-ray diffraction of sulphate efflorescent minerals from El Jaroso Ravine, Sierra Almagrera, Spain

AuthorsFrost, Ray L.; Wain, Daria; Martens, Wayde N.; Locke, Ashley C.; Martínez-Frías, J. ; Rull, Fernando
KeywordsEvaporite
Jarosite
Sulphate
Dehydration
Dehydroxylation
Halotrichite
TG–MS
High-resolution thermogravimetric analysis
Issue Date22-May-2007
PublisherElsevier
CitationThermochimica Acta 460(1-2): 9-14 (2007)
AbstractTwo evaporite minerals from the El Jaroso Ravine, Spain have been analysed by thermogravimetry coupled with an evolved gas mass spectrometer. X-ray diffraction results proved the evaporite minerals were a mixture of sulphates including the minerals magnesiocopiapite, coquimbite and possibly alunogen. Thermal decomposition of the unoxidised samples showed steps at 52, 99 and 143 °C confirmed by mass spectrometric results and attributed to adsorbed water, interstitial water and chemically bonded water. This evaporite mineral rock showed two higher temperature decomposition steps at 555 and 599 °C with mass losses of 19.6 and 7.8%. Slightly different temperatures for the thermal decomposition of the oxadada sample were observed at 52, 64.5 and 100 °C. Two higher temperature mass loss steps at 560.5 and 651 °C were observed for the oxidised sample. By comparison of the thermal analysis patterns of halotrichite and jarosite it can be shown that the El Jaroso samples are mineral sulphates and not halotrichite or jarosite.
Description6 páginas, 7 figuras.-- El PDF del artículo esta en formato pre-print.
Publisher version (URL)http://dx.doi.org/10.1016/j.tca.2007.05.011
URIhttp://hdl.handle.net/10261/13310
DOI10.1016/j.tca.2007.05.011
ISSN0040-6031
Appears in Collections:(CAB) Artículos

Files in This Item:
File Description SizeFormat
8684.pdf351,52 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work

SCOPUSTM   
Citations

10
checked on May 13, 2022

WEB OF SCIENCETM
Citations

9
checked on May 13, 2022

Page view(s)

342
checked on May 19, 2022

Download(s)

321
checked on May 19, 2022

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.