3. Solid-liquid equilibria

The equations for solid-liquid equilibrium curves in the pressure-temperature diagram were proposed by . Pressure uncertainties are less than 3% for equilibria between liquid and ice varieties Ih, III, V, and VI; they are less than 7% in the case of liquid-ice VII equilibrium:

• Melting point of ice Ih (between 273.16 and 251.165 K):

  p /p _n = 1–626,000 [1–(T /T _n )...