5 papers
Pressure-induced desalting of NaCl-bearing ice VII: A compositional filter in water-rich planets
Alasdair Nicholls, Tomasz Poreba, Xi Zhu +6
Sodium chloride is a major component of extraterrestrial oceans, but it is generally assumed to be excluded from the high-pressure ice mantles of water-rich planets. Here we show t…
Negative Thermal Expansion in Cubic Ice: A Collective Quantum Effect of the hydrogen-bond network
Loan Renaud, Tomasz Poreba, Richard Gaal +3
We report neutron powder diffraction measurements and path-integral molecular dynamics simulations of stacking-disorder-free cubic ice I, produced by topotactic degassing of C2…
Discovery of a low-density filled-ice phase in nitrogen hydrate at high pressure
Selene Berni, Sophie Espert, Tomasz Poreba +7
We map the high-pressure phase diagram of nitrogen hydrate up to 16 GPa at room temperature by combining neutron diffraction, Raman spectroscopy, and crystal structure prediction.…
Hydrogen bond symmetrization in high-pressure ice clathrates
Lorenzo Monacelli, Maria Rescigno, Alasdair Nicholls +3
Hydrogen bond symmetrization is a fundamental pressure-induced transformation in which the distinction between donor and acceptor sites vanishes, resulting in a symmetric hydrogen-…
Giant splitting of the hydrogen rotational eigenenergies in the C filled ice
Simone Di Cataldo, Maria Rescigno, Lorenzo Monacelli +7
Hydrogen hydrates present a rich phase diagram influenced by both pressure and temperature, with the so-called C phase emerging prominently above 2.5 GPa. In this phase, hydrog…