Solid mass fractions of solid planetary building blocks formed completely interior (top) to the water ice line and completely exterior (bottom) to the water ice line as function of [Fe/H]. The lines of Fe2O3 and MgSiO3 are overlapping because the mass fraction of these solids is very similar. For solids formed interior to the water ice line, a clear rise in the Mg2SiO4 fraction and decline in the MgSiO3 fraction is visible, caused by the increase of Mg/Si for increasing [Fe/H]. Solid planetary building blocks formed exterior of the water ice line show a clear trend of reduced water ice fraction with increasing [Fe/H], which is then compensated by an increase in Mg2SiO4.
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