doi: https://doi.org/10.1557/jmr.2017.394, Published by Cambridge University Press, 17 October 2017
In Hariskos and Powalla, Reference Hariskos and Powalla1 page 6, first column, lines 14–16, the sentence reading “In contrast, sodium concentrations up to 50 at.% were detected on grain boundaries” should have read, “In contrast, sodium concentrations up to 4 at.% were detected on grain boundaries” as reported in the cited source. The authors regret this error.