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Thermal expansion and ordering in D2O ice III / IX
The high-pressure form of solid water, ice III, is the equilibrium phase in contact with liquid water at pressures from about 2.0 - 3.5 kbar. Consequently, its properties are... -
Magnetic excitations in the quantum spin ice Yb2Ti2O7
We propose to carry out an inelastic neutron scattering experiment at LET to investigate the excitations in the quantum spin ice Yb2Ti2O7. In contrast to other single crystal... -
Kinetics of the ordering transition in ice Ih; crystal structure and thermal ...
Below 80 K ordinary water ice (ice Ih) undergoes a phase transition in which the randomly oriented molecules in the crystal adopt an ordered orientation. This ordered form of... -
Defects and spin correlations in yttrium-doped spin ice
Excitations in spin ice fractionalize into de-confined magnetic monopoles that interact with each other via the magnetic Coulomb interaction. Substituting rare earth ions with... -
Origin of Anomalous Thermal Expansion in Ih phase of Protonated (H2O) and Deu...
Among the all known crystalline ice phases, ice (Ih phase) exhibits anomalous thermal expansion behavior. We propose to measure phonon density of state of protonated ice (H2O)... -
Thermal expansion of recovered high-pressure ice polymorphs
The ambient-pressure phase of ice is a well-known example of a molecular solid that exhibits negative volume thermal expansion below 60 K. In a recent study carried out on HRPD... -
The intermediate stages of hydrogen disorder to order phase transitions in ice
In recent years, our team has discovered three new phases of ice: ices XIII, XIV and XV. On the basis of calorimetric data and some limited diffraction data collected on GEM we... -
A deeper insight into the structural dynamics of MgCl2 materials for catalyti...
In our previous experiment (1810419), we have demonstrated that INS spectra of MgCl2-based samples can be successfully recorded at TOSCA Instrument, even in absence of hydrogen... -
Neutron scattering investigation of the influence of high hydrostatic pressur...
Amyloid fibrils are highly organized filamentous structures formed by the self-assembly of polypeptides. This proposal is to study the effect of pressure on the structure of... -
Structural distortions and magnetic ordering in oxygen depleted spin ice
Geometrical frustration in the spin ice material Dy2Ti2O7 leads to macroscopic degeneracy and the observation of magnetic diffuse neutron scattering down to the lowest... -
Recrystallisation of LiCl-doped ice under pressure
In recent high pressure experiments (S. Klotz et al., Nature Materials, DOI 10.1038/ NMAT2422, 23.4.2009) we discovered a salt hydrate based on a high-pressure ice form, i.e.... -
Structures of metastable water ice XVII with different guests molecules
Very recently, we have studied the crystalline structure of the C0-phase H2-filled ice (recovered at room pressure and low temperature) and ice XVII, a new form of ice... -
Dynamics studies of water and ice in carbon nanohorns
Recent diffraction [GEM] and DINS [Vesuvio] studies of water in carbon nanohorns have suggested that there is substantial proton delocalisation along the H-bond between... -
H2 diffusion in filled ice prepared between 3 and 5 kbar
We propose to study the diffusion of molecular hydrogen (H2, HD and D2) trapped in C0 filled ice prepared at high pressure (3-5 kbar). These systems have a relevant scientific... -
Quantifying the volume isotope effect in high-pressure forms of ice
Water ice forms a remarkable diversity of structures, occurring in as many as 17 crystalline forms. Water ice also shows other interesting and unusual properties. For example,... -
Characterising the amorphicity and porosity of ice aggregates in planet-formi...
With the discovery of almost 3000 exo-planets it is clear that planet formation is a by-product of star formation, yet in the micron ? cm size range, where relative velocities... -
Rheological properties of ice-rock mixtures
The large icy satellites of Jupiter and Saturn are denser than pure water-ice and so must contain "rock" contaminants that can greatly affect each moon's geological (and hence... -
In situ studies of the transition between high-density and very-high-density ...
The amorphous ices are good model systems for the study of pressure amorphisation and provide our princpal experimental test of the two liquids model of water. This seeks to... -
Temperature dependence of the spectra of high-pressure ice III-IX recovered t...
This dataset has no description
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Magnetic correlations in yttrium diluted Ho2-xYxTi2O7 spin ice.
Pure Ho2Ti2O7 exhibits spin ice beahviour. Studies of doped spin ice, replacing Ho with non-magnetic Y, suggest that the spin ice state is present even when the amount of doping...
