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. Author manuscript; available in PMC: 2024 Oct 28.
Published in final edited form as: Chem Rev. 2023 Mar 7;123(14):8945–8987. doi: 10.1021/acs.chemrev.2c00814

Figure 14: Pressure-temperature phase diagram of a substance that can be in a liquid, solid, or vapor phase.

Figure 14:

The red circle indicates the triple point where all three phases coexist. The green circle indicates the critical point where the vapor-liquid coexistence curve terminates. Beyond this critical point, the system forms a single fluid phase.