European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 32, issue 6
Articles | Volume 32, issue 6
https://doi.org/10.5194/ejm-32-675-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-32-675-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 32, issue 6
Research article
 | 
23 Dec 2020
Research article |  | 23 Dec 2020

Grain boundary diffusion and its relation to segregation of multiple elements in yttrium aluminum garnet

Joana Polednia, Ralf Dohmen, and Katharina Marquardt

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Latest update: 02 Nov 2025
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Short summary
Grain boundary diffusion is orders of magnitude faster compared to volume diffusion. We studied this fast transport process in a well-defined garnet grain boundary. State-of-the-art microscopy was used for quantification. A dedicated numerical diffusion model shows that iron diffusion requires the operation of two diffusion modes, one fast, one slow. We conclude that impurity bulk diffusion in garnet aggregates is always dominated by grain boundary diffusion.
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