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Elemental Boron synthesized in supercritical metallic solvents at high pressu...
Our recent high (P,T) developments at PEARL beamline will allow us to study the kinetic and thermodynamic behavior of boron 11B under pressures up to 12 GPa and temperatures up... -
Structure of hot dense liquid carbon dioxide
We propose to study the structure of liquid CO2 by neutron diffraction under high pressure and high temperatures to 6 GPa / 800 K. Carbon dioxide belongs to the most fundamental... -
Structural transformations in pure and Ba-doped PbSc$_{0.5}$Nb$_{0.5}$O$_3$ u...
Lead scandium niobate (PSN) belongs to the class of perovskite-type relaxor ferroelectrics, which are among the key functional materials. Due to their structural complexity, the... -
L-Alanine above 10 GPa
Recently we studied L-alanine to 9.85 GPa. This is the highest pressure for which structural data are available for any organic system larger than methane. The results enabled... -
Pressure-induced high-spin low-spin transition in MnS2 and MnTe2
Pressure induced high-spin (HS) to low-spin (LS) transition in MnS2 was speculated by Chattopadhyay and von Schnering more than twenty years ago from their high pressure X-ray... -
Neutron Total Scattering of Crystalline Materials in the Gigapascal Regime
Over the past few years, extensive developments have been made in the use of neutron diffraction for structural studies of liquids and amorphous materials at high pressure.... -
High-pressure, high-temperature studies of energetic materials - RDX and HMX
One of the aims of this proposal is to quench to ambient pressure a metastable form of the widely used secondary explosive RDX. This is formed above ~4.5 GPa and 448 K but is... -
PTM dependant polymorphism of acrylamide
Our recent X-ray and single crystal studies have shown that acrylamide can undergo different phase transformations depending on the pressure transmitting medium used i.e.... -
The hypersensitivity of the water phase diagram to ammonium fluoride doping
Water displays a highly complex phase diagram that is key to a range of critical processes, from the evolution of icy moons to that of the Earth's hydrosphere and even of life... -
A high pressure structural study of the charge transfer complexes trimethylam...
We propose a high-pressure powder neutron diffraction study of the archetypal donor-acceptor complexes (CD3)3N...I2 and (CD3)3N...ICl . These are the simplest structurally... -
High pressure behaviour of sulfuric acid tetrahydrate
Our previous work on sulfuric acid tetrahydrate (SAT) identified a monoclinic high-pressure polymorph, which forms at 5.35 kbar when the tetragonal low-pressure phase is warmed... -
Structure Solution of the High-Pressure Polymorphs of Hydroxylamine
This proposal requests the allocation of six days beamtime on PEARL to collect neutron powder diffraction data suitable for the structure solution of phases II and III of... -
Evolution of the structure of the Li/ND3 intercalate of FeSe with pressure
This experiment follows our ambient pressure characterisation of the Li intercalate of FeSe which is a superconductor with a Tc of 43 K. Li atoms, amide ions and ammonia... -
Commissioning
This dataset has no description
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Neutronic Studies to Assess New Materials for Optimized Inverted Geometry Spe...
We request 7 days on VESUVIO to evaluate the neutronic performance of several materials used in inverted-geometry neutron spectrometers. In particular, we are interested in... -
Characterising new high-pressure phases of ammonia monohydrate
Over the past two years I have carried out high-pressure surveys of the ammonia monohydrate (AMH) phase diagram using a Paris-Edinburgh press mounted on the D20 beam-line at the... -
A High-pressure Study of the Crystal Structures of CsDF2, ND4DF2 & TlDF2
This proposal seeks PEARL and HRPD beam time to study the pressure and temperature dependence of the crystal structures of deuterated caesium, ammonium and thallium bifluoride.... -
In-situ QENS studies of the nitridation of Calcium Hydride
The proposed experiment will study how material properties change as a function nitridation (eg. the incorporation of nitrogen gas into the material). In previous study at RAL,... -
High Temperature Setup Tests
This dataset has no description
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High-Pressure Investigation of the Ferroelectric ND4IO3
We propose a high-pressure neutron powder diffraction study of the crystal structure of deuterated ammonium iodate, ND4IO3, which is known to undergo a ferroelectric phase...