220 datasets found

Borate glasses are archetypal amorphous oxide characterized by important medium range organisation. These glasses exhibit pressure-induced boron coordination change. The...

We have found that the 134-perovskite, HgMn7O12 (HgAMnA’3MnB4O12) exhibits improper ferroelectric coupling due to an unusual orbital ordering of the manganese cations on both...

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...

This proposal seeks to explore the polymorphism and polymerisation of methacrylic acid using high pressure. We have recently studied acrylic acid at high pressure using single...

We request GEM beamtime to study the structure of a series of calcium germanate glasses. The changes in coordination number and properties which occur in alkali germanate...

Many technologically important processes from ore smelting to hydrogen storage and the synthesis of functional materials rely on solid-gas reactions. Following these reactions...

Diffraction from hydrogenous materials is complicated by its large incoherent scattering contribution. For many materials, deuteration before performing experiments is the...

Glass is an essential material with applications that are dominated by oxides, but fluoride glasses (based on barium zirconium fluorides, "ZBLAN" glasses) have key applications...

A range of novel chlorine-containing bioactive glasses have recently been developed at Queen Mary University of London for dental and orthopaedic applications. At present little...

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....

Pyrazine-I is stable < 302 K, phase II exists from 302-310 K, and phase III from 310-324 K. The known phase-I forms an ordered structure. It is thought that structures of...

PbCoO3 used to be the “missing link” in the PbMO3 perovskite series. PbCoO3 was recently synthesized by the Azuma group using high-pressure synthesis at 12 GPa. NPD at JPARC...

We request beamtime to study lithium silicate glasses over a very wide composition range from 20 to 65 mol.% Li2O, made by rapid quenching. For the higher Li2O contents, the...

The structures of two binary metal carbonyls containing a metal-metal bond Mn2(CO)10 and Re2(CO)10 will be studied as a function of pressure. Both these molecules undergo a...

In a previous WISH experiment, we have succeeded in determining the incommensurate cycloidal magnetic structure of AgFeO2, which induces a ferroelectric polarization[1]....

Hydrophobins, hfb2, are secreted fungal proteins in the form of a small lipopeptide. They are strongly surface active and self-assemble in solution and at interfaces. They have...

A clear description of the local atomic structure as a function of the composition is essential to guide discovery and development of new metallic glasses. The efficient cluster...

At ambient pressure and temperature TiCl4 is a fuming yellow liquid. On cooling it forma a solid composed of essentially isolated tetrahedral molecules; the same structure is...

In a successful recent experiment on IN5 (ILL), we have been able to show that in contrast to commonly accepted wisdom, the excitation gap in nearly optimally doped...

Ge-(Ga,Sb)-S glasses are widely used in infrared optics. Despite the practical importance their short range order is still not understood completely. The main problem is that...