Fig. 2: Thickness of the FeO-rich layer.
From: Extensive iron–water exchange at Earth’s core–mantle boundary can explain seismic anomalies
a The thickness of the FeO-rich layer as a function of the water/interface ratio in the samples. Samples enclosed by the Au capsule without melting of Fe were selected (black symbols). The reaction thickness from samples after Fe melting is shown for comparison (red symbols). Vertical error bars indicate the standard deviations (1σ). Horizontal error bars were assumed to have 30% uncertainties, which occur due to the shape roughness of polycrystalline bridgmanite within the sample chamber. The dashed line shows the linear least square fit of the data with solid iron. b Fe diffusion length within bridgmanite16 and ferropericlase31, compared with the thickness of the FeO-rich layer (red symbols) in our recovered samples.
