Extended Data Fig. 1: Pressure and temperature conditions of sound-velocity and density measurements conducted in the stability field of CaPv. | Nature

Extended Data Fig. 1: Pressure and temperature conditions of sound-velocity and density measurements conducted in the stability field of CaPv.

From: Sound velocity of CaSiO3 perovskite suggests the presence of basaltic crust in the Earth’s lower mantle

Extended Data Fig. 1

The pressure is calibrated against the NaCl scale34. The red line indicates the decomposition boundary of CaPv to Ca2SiO4 larnite and CaSi2O5 titanite39. Dashed lines represent the pressure–temperature paths followed during the travel-time measurements in the two cooling cycles at 15 GPa (blue) and 17 GPa (red) shown in Fig. 2b.