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 …

1999年2月25日 · The structural versatility of solid water has been reinforced by the identification of a metastable, crystalline phase called ice XII (ref. 1). It was obtained by cooling liquid water …

Ice-twelve (ice XII) may be formed by heating high-density amorphous ice at a constant pressure of 0.81 GPa from 77 K to ≈ 183 K at a rate of ≥ 15 K min −1 and recovered at atmospheric …

2003年1月1日 · The Gibbs energy difference between ice XII and ice V and between ice XII and ice VI at high pressures has been estimated in their fully orientationally disordered states from …

2024年10月16日 · Here, we perform molecular dynamics (MD) simulations to demonstrate that when hexagonal ice (ice Ih) exhibits a particular hydrogen ordering, the hydrogen-ordered ice …

1999年2月5日 · Molecular dynamics simulations have been performed on the newly discovered metastable ice XII. This new crystalline ice phase [C. Lobban, J.L. Finney, W.F. Kuhs, Nature …

2000年5月1日 · We present neutron powder diffraction results which give unambiguous evidence for the formation of the recently identified new crystalline ice phase [2], labeled ice XII, in …

2007年7月1日 · Ice XII is a metastable, dense, crystalline phase of solid water, a type of ice. Ice XII was first reported in 1996 by C. Lobban, J.L. Finney and W.F. Kuhs and, after initial …

Ice XIV, a partially hydrogen-ordered counterpart of ice XII. Note that it does not reproduce the occupancies (probability of occupation) of the possible hydrogen sites. [Salzmann 2006]

The spectra of ices VI and XII differ in shape, but the vibrational frequencies are very close in the same P-T regimes. A metastable phase of ice found to form within the stability field of ice VI …