Journal ArticleDOI
New high pressure cell for neutron scattering at very low temperatures
J. Paureau,C. Vettier +1 more
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An apparatus for inelastic neutron scattering experiments at low temperature is described in this article, which consists of an autofrettaged aluminum 7075-T6 alloy cell and a shield.Abstract:
An apparatus for inelastic neutron scattering experiments at low temperature is described. This pressure assembly consists of an autofrettaged aluminum 7075‐T6 alloy cell and a shield. The rupturing pressures for some cells have been measured at different temperatures; the efficiency of the shield has also been tested. These studies demonstrate the feasibility and the safety of experiments under high pressure up to 4 kilobar even at very low temperature.read more
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High-pressure crystallography
TL;DR: New areas of thermodynamic exploration of phase diagrams, polymorphism, transformations between different phases and cohesion forces, structure-property relations, and a deeper understanding of matter at the atomic scale in general are accessible with the high-pressure techniques in hand.
Journal ArticleDOI
High-Pressure Single-Crystal Techniques
TL;DR: The gasketed diamond-anvil cell has become the standard tool for the generation of high pressures over the last three decades and has been applied in a wide range of experimental studies such as Brillouin scattering (Whitfield et al. 1976), Raman spectroscopy (Sharma 1977, Sherman 1984), NMR measurements (Lee et al., 1987) and, of course X-ray diffraction.
Journal ArticleDOI
Pressure-induced charge transfer and dTc/dP in YBa2Cu3O7−x
James D. Jorgensen,Shiyou Pei,Philip Lightfoot,D. G. Hinks,B.W. Veal,Bogdan Dabrowski,Arvydas P. Paulikas,R. Kleb,I.D. Brown +8 more
TL;DR: In this article, the authors measured the structural changes in YBa2Cu3O6.93 and YBa 2 Cu3O 6.60 by neutron powder diffraction for samples in a hydrostatic helium-gas pressure cell.
Journal ArticleDOI
Enclathration of helium in ice II: the first helium hydrate
TL;DR: In this paper, it was shown by neutron powder diffraction experiments that, when applying He gas pressures of > 0.28 GPa, a gas hydrate with the idealized formula He · 6D20 is formed.
Journal ArticleDOI
High-pressure polymorphism in amino acids
TL;DR: A review of high pressure polymorphism in amino acids can be found in this paper, along with three methods that have proved very helpful in the analysis of high-pressure polymorphs, namely the PIXEL method for calculation of intermolecular energies, topological analysis with Voronoi-Dirichlet partitioning, and Hirshfeld surfaces for gaining a graphical overview of inter-molescular interactions.
References
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Journal ArticleDOI
Neutron-diffraction study of N D 4 Cl in the tricritical region
TL;DR: In this paper, a detailed neutron scattering investigation has been made of the order-disorder transition in a crystal of Cl as a function of both temperature and pressure, with emphasis on the region close to the tricritical point (TCP).
Journal ArticleDOI
The equation of state of solid helium: A pressure scale to 20 kbar for high pressure measurements at low temperature
I.L Spain,S Segall +1 more
TL;DR: In this article, the Mie-Gruneisen equation of state of the pressure as a function of temperature along the isochores of helium up to 20 kbar (1 kbar = 108 N m−2) was calculated.
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Handbook of Techniques In High‐Pressure Research And Engineering
TL;DR: In this paper, a handbook of techniques in high pressure research and engineering%0D is presented and the method to download is also simple, read the soft data of guide handbook and then purchase the book to make a bargain.
Journal ArticleDOI
The structure of FeCl2 at high pressures
C. Vettier,W.B. Yelon +1 more
TL;DR: In this article, a full three-dimensional structure determination of FeCl 2 has been performed at hydrostatic pressures up to 6.4 kbar at room temperature, and it has been shown that above 5.8 kbar FeCl has a structure isomorphous to FeBr 2, and the pressure dependence of chlorine position parameter and lattice parameters has been studied over the entire pressure range.