Fig. 2
From: Mapping uncharted territory in ice from zeolite networks to ice structures
Energy-density convex hull. PBE-DFT static lattice energies (red) and free energies including harmonic vibrations (blue) relative to ice Ih for known ice phases (blue labels) and energetically competitive phases (black labels). The labels of the novel energetically competitive phases correspond to the numbering scheme in Fig. 3. The energy-density convex hulls at the static lattice and harmonic vibrational levels are indicated by red and blue solid lines, respectively
