Ice XV is a suggested name for a predicted crystalline form of ice thought to be formed by cooling water to around 108-80 K at 1.1 GPa. It would be the proton-ordered form of ice VI, but has yet to be created in experiments.

Ordinary water ice is known as ice I_h, (in the Bridgman nomenclature). Different types of ice, from ice II to ice XIV, have been created in the laboratory at different temperatures and pressures.

References

• Chaplin, Martin Ice-six structure. Water Structure and Science. Retrieved on 2008-01-02..