Extended Data Fig. 4: X-ray diffraction patterns and chemical analysis of komatiitic composition synthesized at 62 GPa and 2,350 K (K62) and 48 GPa and 2,000 K (K48).
From: Calcium dissolution in bridgmanite in the Earth’s deep mantle
a,b, Miller indices of Ca-rich bridgmanite (Brg), CaSiO3 perovskite (CaPv), stishovite (St), and corundum (Crn) are provided as the black, blue, red, and magenta labels, respectively. The expected diffraction peak positions of CaPv are shown as the blue bars. c,d, A high-angle angular dark-field image (left) and chemical maps (right) of the recovered samples. A small grain of CaPv is rarely observed in c, as the majority of Ca exists in Ca-Brg because of an increase in Ca solubility in Brg with temperature. However, at lower temperature CaPv is frequently observed because of low Ca solubility in Brg at the conditions.
