Multicomponent diffusion in ionic crystals: theoretical model and application to combined tracer- and interdiffusion in alkali feldspar.
Application to alkali diffusion in alkali feldspar
Ionic crystals
Multicomponent diffusion
Theoretical model
Journal
Physics and chemistry of minerals
ISSN: 0342-1791
Titre abrégé: Phys Chem Miner
Pays: Germany
ID NLM: 101662894
Informations de publication
Date de publication:
2020
2020
Historique:
received:
26
03
2020
accepted:
13
07
2020
entrez:
18
8
2020
pubmed:
18
8
2020
medline:
18
8
2020
Statut:
ppublish
Résumé
We present a model for multicomponent diffusion in ionic crystals. The model accounts for vacancy-mediated diffusion on a sub-lattice and for diffusion due to binary exchange of different ionic species without involvement of vacancies on the same sub-lattice. The diffusive flux of a specific ionic species depends on the self-diffusion coefficients, on the diffusion coefficients related to the binary exchanges, and on the site fractions of all ionic species. The model delivers explicit expressions for these dependencies, which lead to a set of coupled non-linear diffusion equations. We applied the model to diffusion of
Identifiants
pubmed: 32801427
doi: 10.1007/s00269-020-01103-9
pii: 1103
pmc: PMC7398302
doi:
Types de publication
Journal Article
Langues
eng
Pagination
35Subventions
Organisme : Austrian Science Fund FWF
ID : P 28238
Pays : Austria
Informations de copyright
© The Author(s) 2020.