Overview of the permissible value ranges of the most-relevant structure and composition parameters for the S-free (left), nominal (center), and S-rich (right) models. The pressures and temperatures given for each layer transition correspond to the values at the top of the lower of the two layers at the boundary. The top row shows all possibilities within the permissible MoI range. The middle and bottom rows only show the models within ±1% of the lowest and highest possible MoI value.