Element partitioning at reaction interfaces in a reactive diffusion setting
- Autor(en)
- Rainer Abart, Jiri Svoboda, Petr Jeřabek, Erwin Povoden-Karadenitz, Gerlinde Habler
- Abstrakt
We report on experimental layer growth of magnesio aluminate spinel (MgAl2O4) at periclase (MgO) corundum (Al2O3) interfaces. Periclase and corundum were contacted and annealed at 1350°C and ambient pressure for 5 to 160 hours. Along the contact a spinel layer formed showing parabolic growth. The spinel exhibits monotonic decrease in Al content from the spinel-corundum interface to the spinel-periclase interface. Whereas the Al-content of spinel is constantly about one mole percent above the equilibrium composition at the spinel-periclase interface, the Al-content of spinel increases with run duration approaching but never attaining local equilibrium at the spinel-corundum interface. Based on these experimental data the kinetic parameters describing long-range diffusion and interface motion in a thermodynamic model are calibrated.
- Organisation(en)
- Department für Lithosphärenforschung
- Externe Organisation(en)
- Czech Academy of Sciences, Charles University Prague, Technische Universität Wien
- Seiten
- 353-354
- Anzahl der Seiten
- 2
- Publikationsdatum
- 2015
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105120 Petrologie
- Schlagwörter
- ASJC Scopus Sachgebiete
- Allgemeine chemische Verfahrenstechnik, Inorganic Chemistry, Materials Chemistry, Metals and Alloys
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/b71a3de4-a978-43d4-842d-2258485e8541