Iron diffusion in a peraluminous sodium aluminosilicate melt at 0.1 MPA
dc.contributor.advisor | Dunn, Todd | |
dc.contributor.author | Ratliffe, William | |
dc.date.accessioned | 2023-06-07T21:26:08Z | |
dc.date.available | 2023-06-07T21:26:08Z | |
dc.date.issued | 1989 | |
dc.description.abstract | The 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.copyright | Not available for use outside of the University of New Brunswick | |
dc.description.note | University of New Brunswick. Department of Geology | |
dc.format.extent | v, 33 pages | |
dc.format.medium | electronic | |
dc.identifier.uri | https://unbscholar.lib.unb.ca/handle/1882/35866 | |
dc.language.iso | en_CA | |
dc.publisher | University of New Brunswick | |
dc.rights | http://purl.org/coar/access_right/c_16ec | |
dc.subject.discipline | Earth Sciences | |
dc.title | Iron diffusion in a peraluminous sodium aluminosilicate melt at 0.1 MPA | |
dc.type | senior report | |
thesis.degree.discipline | Earth Sciences | |
thesis.degree.fullname | Bachelor of Science | |
thesis.degree.grantor | University of New Brunswick | |
thesis.degree.level | undergraduate | |
thesis.degree.name | B.Sc. |