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Low-Temperature Structural Phase Transitions in GeV4S8
The defect thiospinel, GeV4S8 adopts a cubic structure at room temperature (space group F-43m). We have identified a new monoclinic phase of this material at 2K, which may be... -
Structure and properties of ammonium-doped water ice
The ammonium anion is comparatively soluble in ice and may also increase the solubility of associated cations that would otherwise not be easily accommodated in the crystal... -
Structure and Stability of Copper Hydroxy Halides, Products of Anion Exchange...
We have successfully synthesised materials based on naturally occurring minerals and structurally related phases with the formula, Cu2(OH)3X where X is an anion. Phases with the... -
Thermal expansion of H and D ice
This dataset has no description
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Chemical control of structures and properties of cobalt oxide chalcogenides
The evolution of the crystal structures and magnetic ordering of layered cobalt oxide chalcogenides will be probed as a function of composition. The systems Sr2CoO2Cu2-zSe2 and... -
Investigating the structural effects of bioactivity enhancements in doped hyd...
We wish to gain a deeper understanding of where dopant cations and anions reside in hydroxyapatite (HA). We will substitute Sr, Si, 11B and S into the HA structure and determine... -
Variable Temperature Study of thallium and caesium azides
This proposal seeks to investigate the effect of temperature on the structures of thallium and caesium azide. High-resolution neutron powder diffraction data are necessary to... -
Me-ND311BD4: a temperature dependent study of its crystal structure and decom...
We request 4 days on HRPD with the IGAn apparatus to follow the structural changes of Me-ND4 11BD4 as a function of temperature. The high resolution of HRPD will allow us to... -
High-Resolution High-Pressure Study of the Elpasolite Perovskite La2NiMnO6
This proposal sets out to investigate the high pressure behaviour of the double perovskitematerial with the chemical formula La2NiMnO6. The properties of this and related... -
A Self-consistent Description of the Thermoelastic Properties of Dielectric P...
20 years ago, Anderson proposed that the thermoelastic properties of the dominant (mantle) phase within the Earth, MgSiO3 perovskite, could be described as a simple Debye solid.... -
Strain analysis of commensurate charge order/zener polaron ordering transitio...
High resolution powder diffraction data will be used to obtain lattice parameter and atomic coordinate variations as a function of temperature for Pr0.6Ca0.4MnO3, which has a... -
Investigating temperature dependent magnetic and crystal structures of misfit...
Thermoelectric materials provide an alternative route for refrigeration and power generation bydirect conversion between thermal and electrical energy. With high chemical... -
Spontaneous strain and framework distortion in hybrid Prussian blue analogues
The metal-organic Prussian blue analogues (HIm)2K[M(CN)6], where HIm is the imidazolium cation and M = Fe or Co, have switchable dielectric constants, since the imidazolium ions... -
Structural Studies of Li(ND3)n11BD4
On exposure to ammonia, Li(11)BD4 forms the ammoniate Li(11)BD4(ND3)n. Our recent experiment (RB820252) has shown that there are four distinct crystalline phases in the... -
Thermoelastic properties of ammonium sulfate, (ND4)2SO4, and the P-T dependen...
Ammonium sulfate exhibits a first-order phase transition upon cooling through ~ 224 K at room pressure, from a paraelectric to a ferroelectric crysta. There are outstanding... -
From giant magneto-elastic coupling to negative thermal expansion
We recently used high-resolution neutron diffraction on HRPD to observe the largest magneto-elastic coupling ever seen in a metallic magnet. The material studied was CoMnSi, a... -
Crystal symmetry change at the magnetic transition in MnB and FeB compounds p...
The "magnetocaloric effect" (MCE) is based on the entropy difference encountered when themagnetic state of a material is changed and it can be used for refrigeration. However,... -
Improper ferroelectricity in hexagonal tungsten bronzes
Ferroelectrics are an important class of materials in modern electronics. Their application range from simple capacitors to ultrasonics transducers and sensors to memory... -
Powder Diffraction Study of Ion Exchanged AV-7
The aim of this study is to elucidate the crystal structures of a series of microporous tin silicate materials after different degrees of ion exchange with strontium. The... -
Crystal structure and thermal expansion of acetylene (C2D2)
Acetylene is produced in great abundance in the solar system wherever carbonaceous solids are exposed to energetic radiation. It has been the subject of several studies,...
