Thermophysical Properties of Natural Glasses at the Extremes of the Thermal History Profile

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Show simple item record Thomas, P Sestak, J Heide, K Fuglein, E Simon, P
dc.contributor.editor Sestak, J
dc.contributor.editor MAres, JJ
dc.contributor.editor Hubik, P 2012-10-12T03:37:28Z 2011-01
dc.identifier.citation Glassy, Amorphous and Nano-Crystalline Materials: Thermal Physics, Analysis, Structure and Properties, 2011, 1, pp. 311 - 326
dc.identifier.isbn 978-90-481-2881-5
dc.identifier.other B3 en_US
dc.description.abstract Natural amorphous glassy silicates are widely distributed and are found in quantities that range from micrograms to kilo tonnes and, hence, their occurrence is from microscopic glassy inclusions to glassy mountains [1]. These natural glasses have two generic origins which may be generalised as vitreous glasses, formed from the melt state by relatively rapid cooling at cooling rates that inhibit crystal formation, or diagenetic glasses, formed by a dissolution-precipitation mechanism where crystallisation is inhibited by the Ostwalds rule of stepwise petrogenesis [2]. The thermal histories of a range of natural glasses are depicted in the schematic of Fig. 19.1 and vary signi?cantly from the typical conditions used in the glass industry which are optimised between processing speed and energy conservation. In the extremes, tektites like moldavites are formed by extremely fast heating and melting at very high temperatures (> 3,000 K) followed by quenching at extreme cooling rates (10 K/s). By contrast the formation of amorphous glasses from mineral diagenesis or biotic processes occurs at much lower temperatures and over longer time periods; the formation of sedimentary opal, for example, occurs at ambient temperatures, it is essentially isothermal, and takes place over long periods of time of the order of months to years
dc.format Scott McWhirter
dc.publisher Springer
dc.relation.isbasedon 10.1007/978-90-481-2882-2_19
dc.subject NA
dc.subject NA
dc.title Thermophysical Properties of Natural Glasses at the Extremes of the Thermal History Profile
dc.type Chapter
dc.parent Glassy, Amorphous and Nano-Crystalline Materials: Thermal Physics, Analysis, Structure and Properties
dc.journal.number en_US
dc.publocation The Nethelands en_US
dc.publocation The Nethelands
dc.publocation The Nethelands
dc.publocation The Nethelands
dc.identifier.startpage 311 en_US
dc.identifier.endpage 326 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0306 Physical Chemistry (Incl. Structural)
dc.personcode 960405 en_US
dc.personcode 0000067717 en_US
dc.personcode 0000067718 en_US
dc.personcode 0000077298 en_US
dc.personcode 0000019985 en_US
dc.percentage 100 en_US Physical Chemistry (incl. Structural en_US
dc.classification.type FOR-08 en_US
dc.edition 1 en_US
dc.edition 1
dc.edition 1
dc.edition 1
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pubs.organisational-group /University of Technology Sydney
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