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A method for controlling alkali-metal oxide activities in one-atmosphere experiments and its application to measuring the relative activity coefficients of NaO0.5 in silicate melts

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dc.contributor.authorO'Neill, Hugh
dc.date.accessioned2015-12-13T22:57:39Z
dc.date.issued2005
dc.date.updated2015-12-12T07:17:50Z
dc.description.abstractThe activity of alkali metal oxides can be controlled in one-atmosphere wire-loop experiments at high temperature by suspending a crucible containing alkali silicate melt beneath the samples. The method has been applied to measuring the activity coefficient of NaO0.5 in a series of CMAS-NaO0.5 melts relative to that in the anorthite-diopside eutectic composition at 1400 °C, using a reservoir of NaO0.5-SiO2 melt. The results show that this relative activity coefficient decreases strongly with SiO 2, increases with CaO and MgO, but is insensitive to AlO0.5. This latter behavior is inconsistent with " quasi-crystalline" models of melt thermodynamics that hypothesize Na-Al species.
dc.identifier.issn0003-004X
dc.identifier.urihttp://hdl.handle.net/1885/83064
dc.publisherMineralogical Society of America
dc.sourceAmerican Mineralogist
dc.subjectKeywords: alkali metal; silicate melt; thermodynamics; Sio
dc.titleA method for controlling alkali-metal oxide activities in one-atmosphere experiments and its application to measuring the relative activity coefficients of NaO0.5 in silicate melts
dc.typeJournal article
local.bibliographicCitation.lastpage501
local.bibliographicCitation.startpage497
local.contributor.affiliationO'Neill, Hugh, College of Physical and Mathematical Sciences, ANU
local.contributor.authoruidO'Neill, Hugh, u8101317
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor040306 - Mineralogy and Crystallography
local.identifier.ariespublicationMigratedxPub11272
local.identifier.citationvolume90
local.identifier.doi10.2138/am.2005.1792
local.identifier.scopusID2-s2.0-14944350395
local.type.statusPublished Version

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