The thermophysical properties of australian opal

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dc.contributor.author Smallwood, AG
dc.contributor.author Thomas, PS
dc.contributor.author Ray, AS
dc.date.accessioned 2010-05-28T09:58:38Z
dc.date.issued 2008
dc.identifier.citation Australasian Institute of Mining and Metallurgy Publication Series, 2008, pp. 557 - 560
dc.identifier.isbn 9781920806873
dc.identifier.other E1 en_US
dc.identifier.uri http://hdl.handle.net/10453/10694
dc.description.abstract The characterisation of the surface area and porosity of opals derived from Tintenbar, a volcanic environment, and Lightning Ridge, a sedimentary environment, using nitrogen gas adsorption at -196°C is reported. Both opal types were found to have relatively low surface areas and displayed little porosity. The low surface areas observed is indicative of the ability of silica to infill voids and interstices. Thermogravimetric analysis of the samples before and after degassing was carried out to determine the amount of water removed by the degassing process. Negligible difference was found in the water content before and after degassing in the case of the Lightning Ridge sedimentary opal, while the Tintenbar volcanic opal was found to have lost more that 60 per cent of its water during the degassing process. These differences were ascribed to the differences in the silica structure of the opals with the Lightning Ridge opal having a denser cage structure, which traps the molecular water, while a more open structure is postulated for the Tintenbar opal, allowing the water to be relatively easily removed.
dc.relation.hasversion Accepted manuscript version en_US
dc.title The thermophysical properties of australian opal
dc.type Conference Proceeding
dc.parent Australasian Institute of Mining and Metallurgy Publication Series
dc.journal.number en_US
dc.publocation Australia en_US
dc.identifier.startpage 557 en_US
dc.identifier.endpage 560 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0303 Macromolecular and Materials Chemistry
dc.personcode 960405
dc.personcode 860311
dc.percentage 100 en_US
dc.classification.name Macromolecular and Materials Chemistry en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom International Congress foe Applied mineralogy en_US
dc.date.activity 20080908 en_US
dc.location.activity Brisbane, Australia en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - Built Infrastructure
pubs.organisational-group /University of Technology Sydney/Strength - Built Infrastructure
pubs.organisational-group /University of Technology Sydney/Strength - Management and Organisation Studies
pubs.organisational-group /University of Technology Sydney/Strength - Management and Organisation Studies
utslib.copyright.status Open Access
utslib.copyright.date 2015-04-15 12:23:47.074767+10
utslib.copyright.date 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
pubs.consider-herdc true
utslib.collection.history General (ID: 2)
utslib.collection.history School of Chemistry and Forensic Science (ID: 339)
utslib.collection.history School of Chemistry and Forensic Science (ID: 339)
utslib.collection.history School of Chemistry and Forensic Science (ID: 339)


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