Fig. 6: Interior pressure and density for an eight-Earth-mass carbide planet.
From: Structure and density of silicon carbide to 1.5 TPa and implications for extrasolar planets
The carbide planet is modeled with a 30% by mass Fe or Fe-15wt%Si (Fe-15Si) core and a 70% SiC or C and SiC (1:1 molar fraction) mantle. The addition of Si in the core decreases pressures and densities in the core but increases core size. CMB, core-mantle boundary; TZ, transition zone (due to the B3 to B1 transition in SiC).
