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Structural Studies of High Level Waste Glass
The aim of this proposal is to develop a methodology to investigate multicomponent glass structure, combining neutron diffraction, XRD, NMR, ab initio MD, and RMC. We wish to... -
The effect of combined modifiers: understanding the interactions between alka...
The mixed alkali effect is a well-known phenomenon whereby combining two alkalis in a ternary glass system can produce physical properties which can be superior to, but cannot... -
Local structure and dynamics in metal-imidazolate frameworks
This proposal aims to study local structure and dynamics in two metal-organic frameworks (MOFs): namely, zinc imidazolate and cobalt imidazolate. Imidazole (IM) is a small, flat... -
Hybrid glassy chalcogenides with non-centrosymmetric HgI2 molecules
Non-linear optical (NLO) crystals are widely used in advanced photonic technologies for second harmonic and difference frequency generation (SHG, DFG), producing coherent light... -
Ferroelectric transitions in potentially multiferroic Mn-formate frameworks
The perovskite-like family of ammonium formate frameworks AB(HCO2)3, where A is a divalent metal ion and B is an (alkyl)ammonium or guanadinium, is of great interest for its... -
Chemical disorder and network structure of glassy As2Te3
Telluride glassy systems are widely used for phase-change optical recording. They are also promising materials for far-IR applications. The atomic structure of telluride glasses... -
How molecular solids prepare for phase transitions: The phase transition in o...
Oxalyl chloride, which is a liquid at RT, forms a disordered phase (I) on cooling to 260 K. This phase is unstable with respect to an ordered phase (II) below 250 K, but in... -
The structural role of carbonate groups in glass
We request GEM beamtime to study the structure of samples of sodium silicate glass with and without CO3 carbonate groups. The presence of CO3 carbonate groups in the glasses is... -
Correlating Structural and Magnetic Disorder in Sc-substituted SCGO (SrCr9Ga3...
A prototypical frustrated magnet in which structural disorder plays a key role is SrCr9pGa12−9pO19 (SCGO). It is postulated that structurally ordered SCGO hosts a... -
Unraveling the crystal structure of cuprice, CuOH×H2O GEM
Long-term nuclear waste repository strategies in Europe include the developing of safe multi-barrier isolation of spent nuclear fuel. One of the considered schemes is the... -
Short range static and thermal disorder in glasses and crystals
We seek to use the temperature-dependence of the neutron correlation function to investigate the extent of static disorder in glasses and crystals, and also to investigate the... -
Monitoring Packing Changes in Magnetic Halogenated Phthalocyanine Molecules
The way that small molecules pack together can have substantial ramifications on the observed physical properties, reactivity, and device characteristics, even if the molecule... -
Texture evolution in Zircalloy 4 during beta heat treatment
The aim of the proposed experiment is to measure the changes in crystallographic temperature during beta quenching of Zircalloy 4, an important nuclear fuel cladding material. -
The Calcium Environment in Gallate Glasses
The environment of calcium in glasses is of widespread interest, and there has been a number of structural studies of calcium aluminate glasses. However, the experimental data... -
Investigation of the relaxor-photoferroelectric Ba(Sn,Ti)O3 compounds using n...
The local structural distortions in BaTiO3-based solid solutions, where the Ti4+ site is substituted by isovalent Sn4+ cation Ba(Sn,Ti)O3, are characterized by no oxygen tilts... -
Local structure of liquid gallium-iodine and gallium-indium
Liquid metal alloys, with liquidus temperatures close to room temperature, are a rapidly developing research area with novel applications in renewable energy, catalysis,... -
Extending the limits of experimental structure determination of amorphous sub...
Ge-As-Se glasses are interesting for two main reasons: they are widely used in infrared optics and optoelectronics and they serve as model materials for theories of glass... -
1D magnetic structure of a multiferroic metal-formate perovskite
The metal-organic framework perovskite analogue guanadinium copper(II) formate has achieved considerable recent attention for its multiferroic properties and consequent... -
Polyhedral connectivity in high lead silicate glasses
We have a long-established interest in the structural role of heavy-metal, lone-pair cations such as Pb in glasses. PbO can be incorporated to very high concentrations in oxide... -
Structural investigation of perovskite-based ferroelectric materials through ...
The aim of this proposal is a comprehensive structural investigation of a technologically-important perovskite-based ferroelectric material xBiScO3-(1-x)PbTiO3 through studying...