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Title: Structure and stability of solid Xe(H2)n

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4908265· OSTI ID:1335840
 [1];  [2];  [3];  [1]
  1. Carnegie Institution of Washington, Washington, D.C. (United States)
  2. Univ. of Chicago, Argonne, IL (United States)
  3. Carnegie Institution of Washington, Argonne, IL (United States)

Mixtures of xenon and molecular hydrogen form a series of hexagonal, van der Waals compounds at high pressures and at 300 K. Synchrotron, x-ray, single crystal diffraction studies reveal that below 7.5 GPa, Xe(H2)8 crystallizes in a P3¯m1 structure that displays pressure-induced occupancy changes of two pairs of xenon atoms located on the 2c and 2d sites (while the third pair on yet another 2c site remains fully occupied). The occupancy becomes 1 at the P3¯m1 to R3 transition and all the xenon atoms occupy the 3d sites in the high-pressure structure. These pressure-induced changes in occupancy coincide with volume changes that maintain the average Xe:H2 stoichiometry fixed at 1:8. Furthermore, the synchrotron x-ray diffraction and Raman measurements show that this unique hydrogen-bearing compound that can be synthesized at 4.2 GPa and 300 K, quenched at low temperatures to atmospheric pressure, and retained up to 90 K on subsequent warming.

Research Organization:
Carnegie Institution of Washington, Washington, D.C. (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002006; AC02-06CH11357; FG02-06ER46280; FG02-99ER45775; NA-0002006; NA0001974
OSTI ID:
1335840
Alternate ID(s):
OSTI ID: 1228238
Journal Information:
Journal of Chemical Physics, Vol. 142, Issue 10; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

References (51)

Structure, Bonding, and Geochemistry of Xenon at High Pressures journal August 1997
WinGX and ORTEP for Windows : an update journal July 2012
High-pressure transformations in xenon hydrates journal December 2001
Clathrate hydrate of xenon at high pressure journal January 1996
Density and Expansivity of Solid Xenon journal December 1962
X-ray diffraction and equation of state of hydrogen at megabar pressures journal October 1996
Temperature effects on the universal equation of state of solids journal February 1987
Novel H 2 - H 2 O clathrates at high pressures journal November 1993
Clathrate formation in water-noble gas (Hydrogen) systems at high pressures journal September 1999
Oxygen/noble gas binary phase diagrams at 296 K and high pressures journal July 2010
Dynamics of Kr in dense clathrate hydrates journal May 2011
Clathrate formation in the Ar–H2O system under pressures up to 15000 bar journal January 1997
E FFECTS OF H IGH P RESSURE ON M OLECULES journal October 2000
Novel Cooperative Interactions and Structural Ordering in H 2 S H 2 journal December 2011
Stability of van der Waals compounds and investigation of the intermolecular potential in helium–xenon mixtures journal October 1992
Hydrogen storage in molecular compounds journal January 2004
Raman Spectroscopy at High Pressures journal January 2012
New high-pressure van der Waals compound Kr(H2)4 discovered in the krypton-hydrogen binary system journal May 2014
Retention of Xenon in Quartz and Earth's Missing Xenon journal November 2005
Phase annealing in SHELX-90: direct methods for larger structures journal June 1990
β ‐diopside, a new ultrahigh‐pressure polymorph of CaMgSi 2 O 6 with six‐coordinated silicon journal December 2012
High pressure single-crystal micro X-ray diffraction analysis with GSE_ADA/RSV software journal August 2013
Ruby pressure scale in a low-temperature diamond anvil cell journal December 2012
A colloidal model system with an interaction tunable from hard sphere to soft and dipolar journal January 2003
Freezing in Resonance Structures for Better Packing: XeF 2 Becomes (XeF + )(F ) at Large Compression journal April 2011
New anvil designs in diamond-cells journal September 2004
Phase Behavior of H 2 + H 2 O at High Pressures and Low Temperatures journal February 2011
Raman spectroscopy of metals, high-temperature superconductors and related materials under high pressure journal January 2003
High-Pressure Compounds in Methane-Hydrogen Mixtures journal March 1996
Oxygen impurities reduce the metallization pressure of xenon journal July 2012
On the temperature correction to the ruby pressure scale journal May 1991
A short history of SHELX journal December 2007
Entropy-driven formation of a superlattice in a hard-sphere binary mixture journal September 1993
Evidence for xenon silicates at high pressure and temperature: XE-SILICATES AT HIGH PRESSURES journal September 2002
Vibrational dynamics, intermolecular interactions, and compound formation in GeH4-H2 under pressure journal October 2010
Anharmonicity and the equation of state for gold journal February 1989
Ground and excited states of Xe + 2 observed by high resolution threshold photoelectron spectroscopy of Xe 2 journal January 1995
All Different Flavors of Synchrotron Single Crystal X-Ray Diffraction Experiments book January 2010
A high-pressure van der Waals compound in solid nitrogen-helium mixtures journal July 1992
Atypical compounds of gases, which have been called ‘noble’ journal January 2007
THE RAMAN SPECTRA OF LIQUID AND SOLID H 2 , D 2 , AND HD AT HIGH RESOLUTION journal January 1962
Melting Curves of H 2 , D 2 , and T 2 up to 3500 kg/ cm 2 journal February 1956
Close-packed structures of spheres of two different sizes II. The packing densities of likely arrangements journal December 1980
Superlattice formation in binary mixtures of hard-sphere colloids journal June 1992
High-pressure x-ray diffraction study of solid xenon and its equation of state in relation to metallization transition journal June 1984
Two- and three-dimensional extended solids and metallization of compressed XeF2 journal July 2010
Structural and vibrational properties of condensed phases in xenon molecular binary systems: He-Xe, H 2 -Xe journal March 2010
Two-dimensional detector software: From real detector to idealised image or two-theta scan journal January 1996
Pressure-induced bonding and compound formation in xenon–hydrogen solids journal November 2009
Toward Determination of the New Hydrogen Hydrate Clathrate Structures journal October 2013
Theoretical investigation of xenon-hydrogen solids under pressure using ab initio DFT and G W calculations journal September 2011

Cited By (4)

Reactivity of He with ionic compounds under high pressure journal March 2018
Prediction of the Reactivity of Argon with Xenon under High Pressures journal August 2019
High-pressure studies with x-rays using diamond anvil cells journal November 2016
References book June 2018

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