The investigation reveals a significant observation: the formation of the ice VII structure exclusively occurs in the backward direction when optical breakdown takes place, provided that the input energy falls below 90 mJ for liquid water or 75 mJ for heavy water. This phase transition is ...
In particular, we are investigating whether the freezing state of metastable water at high compression rates above 2 GPa is indeed ice VII or a metastable structure, and why the transition sequence reverses compared to rapid cooling, i.e. with an amorphous phase at low compression rates and a...
In this context, it would be interesting to investigate if the hydrogen-disordered ice VII obtained by low-temperature compression28 is crystallographically fully consistent with the space group symmetry of the corresponding high-temperature phase. Finally, it is interesting to note that pressure-...
VII, and VIII the tetrahedron is regular—that is, the angle between the bonds is 109°28’. The high density of ice VII and VIII is explained by the fact that their structures contain two three-dimensional networks of hydrogen bonds (each of which is identical to the structure of ice Ic...
Plastic ice VII: Exotic substance likely found in space created in the lab Water ice is a far more complex substance than we might assume. Scientists have now created an exotic new form of ice in the lab, known as “plastic ice VII.” This strange version could exist naturally on other...
Ice-VII is a high-pressure polymorph of H 2 O ice and an important mineral widely present in many planetary environments, such as in the interiors of large icy planetary bodies, within some cold subducted slabs, and in diamonds of deep origin as mineral
Water isn’t just liquid, ice, or vapor — under extreme conditions, it can transform into exotic phases, such as the newly observed plastic ice VII. This hybrid phase, predicted years ago but only recently confirmed using cutting-edge neutron spectrometers, exhibits both solid-like structure an...
We probe the possible inclusion of salt (NaCl) in the ice VII lattice over the pressure range from 2 to 4 gigapascal. We combine data from neutron diffraction experiments under pressure and from computational structure searches based on density functional theory. We observe that the high density...
VII, and VIII the tetrahedron is regular—that is, the angle between the bonds is 109°28’. The high density of ice VII and VIII is explained by the fact that their structures contain two three-dimensional networks of hydrogen bonds (each of which is identical to the structure of ice Ic...
8, VIII, ice8Ice VIII, a hydrogen-ordered counterpart of ice VII. [Kuhs 1998] 9, IX, ice9Ice IX, a hydrogen-ordered counterpart of ice III. [Londono 1993] A, iceAHypothetical ice A. [Baez 1998] A15, Struct33Cubic Structure I of clathrate hydrate. [Sikiric 2010] ...