Ice III is a form of solid matter which consists of

tetragonal In crystallography, the tetragonal crystal system is one of the 7 crystal systems. Tetragonal crystal lattices result from stretching a cubic lattice along one of its lattice vectors, so that the cube becomes a rectangular prism with a squar ...

crystalline A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macros ...

ice, formed by cooling

water Water (chemical formula ) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as ...

down to at . It is the least dense of the high-pressure water phases, with a

density Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematicall ...

of (at 350 MPa). It has a very high relative permittivity at 117 and has a density of (making it more dense than water). The proton-ordered form of is ice IX. Ordinary water ice is known as , (in the Bridgman nomenclature). Different types of ice, from Ice II to

Ice XIX Ice XIX is a proposed crystalline phase of water. Along with ice XV, it is one of two phases of ice directly related to ice VI. Ice XIX is prepared by cooling HCl-doped ice VI at a pressure above 1.6 GPa down to about 100 K. As of 2022, its cry ...

, have been created in the laboratory at different temperatures and pressures.

References

* Water ice {{inorganic-compound-stub

See also

References