Iron diffusion in a peraluminous sodium aluminosilicate melt at 0.1 MPA

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dc.contributor.advisorDunn, Todd
dc.contributor.authorRatliffe, William
dc.date.accessioned2023-06-07T21:26:08Z
dc.date.available2023-06-07T21:26:08Z
dc.date.issued1989
dc.description.abstractThe chemical diffusivity of ferrous and ferric iron have been measured in a peraluminous sodium aluminosilicate melt over the temperature range 1250-1450°C by a diffusion couple technique. The diffusivity of ferrous iron defines an Arrhenius line with the equation: log10D = - 2.03±0 .09 -194300±58300/2 .303RT where the activat ion energy is -194.3±58.3 KJmo1-1. The diffusivity of ferric iron was estimated to be: log10D = -6.55±2.13 - 69700±16300/2.303RT where the activation energy is 69.7±16.3 KJmo1-1. The ferrous iron results are non-linear with respect to reciprocal temperature, and define a Fulcher equation of the form: log10D = - 7.16±.79 -280±4 3/ (T-1366) suggesting a decrease in activation energy of diffusion as temperature increases. This may be caused by a temperature induced disproportionation of the anionic melt structure. The diffusivity of ferrous iron increases sharply from 0 .1 MP a to 0.6 GPa suggesting a pressure induced depolymerization of the melt.
dc.description.copyrightNot available for use outside of the University of New Brunswick
dc.description.noteUniversity of New Brunswick. Department of Geology
dc.format.extentv, 33 pages
dc.format.mediumelectronic
dc.identifier.urihttps://unbscholar.lib.unb.ca/handle/1882/35866
dc.language.isoen_CA
dc.publisherUniversity of New Brunswick
dc.rightshttp://purl.org/coar/access_right/c_16ec
dc.subject.disciplineEarth Sciences
dc.titleIron diffusion in a peraluminous sodium aluminosilicate melt at 0.1 MPA
dc.typesenior report
thesis.degree.disciplineEarth Sciences
thesis.degree.fullnameBachelor of Science
thesis.degree.grantorUniversity of New Brunswick
thesis.degree.levelundergraduate
thesis.degree.nameB.Sc.

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