Water ice fraction of the planets for a model where the water ice line is fixed at ~5.5 AU and the planets do not migrate. The labels of r₀ and t₀ indicate where and when a planetary embryo was introduced into the disc. The white and black lines correspond to the lines of FeS, Fe₃O₄, H₂ O, and NH₃. Only planetsforming exterior to ~5.5 AU (at T < 150 K) can contain water ice. These planets contain by mass about ~ 35% of water ice, which is the maximum allowed in our chemical model.