Fig. 4
From: Altered chemistry of oxygen and iron under deep Earth conditions
The calculated charge density landscape of pyrite-structured FeO2 at 100 GPa. a Gold surface represents charge density of 0.15 e/Å3. The section cut through the \((1\bar 10)\) plane shows the weak O–O bonding feature. Brown balls are Fe atoms and red balls are O atoms. b Charge density distribution projected on the \((1\bar 10)\) plane. The level of charge density is reflected by the color bar
