Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Variation of Fe3+/∑Fe with pressure for Na-rich Maj (this study) compared with literature data for majoritic Grt included in sub-lithospheric diamonds29, a natural eclogitic Maj included in Grt48, and synthetic peridotitic Maj under redox buffered conditions49,50.