Before revision: IW represents Iron-Wüstite buffer and QFM represents Quartz-Fayalite-Magnetite buffer.| 388x388px Mantle oxidation state (redox state) applies the concept of oxidation state in chemistry to the study of the Earth's mantle.
After revision: IW represents Iron-Wüstite buffer and QFM represents Quartz-Fayalite-Magnetite buffer.| upright=1.35 Mantle oxidation state (redox state) applies the concept of oxidation state in chemistry to the study of the Earth's mantle.