Pressure
Anomalies concerning the unexpected behavior of water under various pressure conditions -- from melting point depression to structural changes at high pressure.
Thermal conductivity, shear modulus, and transverse sound speed of ice decrease with pressure
For most solids these properties increase with pressure -- for ice they decrease.
The structure of liquid water changes at high pressure
Under high pressure, the short-range order of liquid water changes fundamentally.
Pressure reduces the melting point of ice
Higher pressure lowers the melting point of ice -- unique among common substances.
Pressure reduces the temperature of maximum density
With increasing pressure, the temperature of maximum density shifts to lower values.
Thermal expansion of water increases with rising pressure
The thermal expansion coefficient of water increases unusually strongly with pressure.
Under high pressure, water molecules move further apart with increasing pressure
At high pressure, the average distance between water molecules paradoxically increases.
The viscosity of water decreases with pressure below 33 degrees Celsius
For most liquids, viscosity increases with pressure -- for cold water it decreases.
At low temperatures, self-diffusion increases with rising density and pressure
Counterintuitively, water becomes more mobile at low temperatures under pressure.
Thermal diffusivity reaches a maximum at approximately 0.8 GPa
The thermal diffusivity of water shows a maximum at high pressure.