There are also two metastable phases of ice under pressure, both fully hydrogen-disordered; these are Ice IV and Ice XII. Crystal structure of ice I h. Dashed lines represent hydrogen …

Ice XI. The hydroxide ions create defects in the hexagonal ice allowing protons to jump more freely between the oxygen atoms (and so this structure of ice XI breaks the 'ice rules'). The …

Oct 15, 2014 · Ice XI, the proton-ordered phase of ordinary ice, features aligned water dipoles. It can be synthesized under laboratory conditions at T ∼ 72 K. Recently, speculations on ice XI …

Apr 15, 1989 · Below 72 K ice doped with KOH transforms to an ordered phase known as ice XI. A powdered sample of such doped ice annealed for several days below 72 K was studied by …

Mar 1, 2024 · Neutron diffraction data for Ice XI is compared with DFT calculations. The peak shapes have been fitted to the GSAS-II anisotropic strain broadening model. The molecular …

Oct 1, 2016 · IR and Raman spectroscopic technology can be directly used to identify the occurrence of ferroelectric ice XI in laboratory or extraterrestrial settings. The performance of …

Ice XI is the hydrogen-ordered form of Ih, the ordinary form of ice. Different phases of ice, from ice II to ice XVIII, have been created in the laboratory at different temperatures and pressures. …

Jan 21, 1999 · Jackson et al. 3 show that the neutron diffraction of ice XI is consistent with a ferroelectric arrangement, although the exact structure and degree of alignment are not …

Oct 11, 2024 · Ice XI is the hydrogenordered form of Ih, the ordinary form of ice. Different phases of ice, from ice II to ice XVI, have been created in the laboratory at different temperatures and …

Mar 31, 2005 · Ice XI is the low temperature, low pressure, ferroelectric, and hydrogen-ordered form of common ice Ih – a typical 1HBN. Similarly, ice VIII is the low temperature, high …