Formation of H2-rich iodine-hydrogen compounds at high pressure

Jack Binns; Philip Dalladay-Simpson; Mengnan Wang; Graeme Ackland; Eugene Gregoryanz; Ross T. Howie

doi:10.1103/PhysRevB.97.024111

Formation of H2-rich iodine-hydrogen compounds at high pressure

Jack Binns^*, Philip Dalladay-Simpson, Mengnan Wang, Graeme Ackland, Eugene Gregoryanz, Ross T. Howie

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

We have used synchrotron x-ray and Raman spectroscopic studies combined with molecular dynamics to investigate the I-2-H-2 system at high pressure. By laser heating the mixture above 25 GPa we synthesized the molecular compound HI(H-2)(13), with the AB(13) structure type and unusually high volumetric hydrogen content. The isolation of HI molecules by (H-2)(13) supramolecular clusters stabilizes the compound over a remarkable pressure range from 9 to at least 130 GPa. At lower pressures and 300 K another compound, hydrogen diiodane H-2(HI)(2), spontaneously forms, being stable up to 12.5 GPa.

Original language	English
Article number	024111
Number of pages	6
Journal	Physical Review B
Volume	97
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.97.024111 https://doi.org/10.1103/PhysRevB.97.024111
Publication status	Published - 24 Jan 2018

Keywords / Materials (for Non-textual outputs)

METAL-ORGANIC FRAMEWORKS
X-RAY-DIFFRACTION
MOLECULAR DISSOCIATION
DENSE HYDROGEN
SOLID IODINE
STORAGE
PHASE
DEUTERIUM
SPECTRA
SYSTEM

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https://journals.aps.org/prb/abstract/10.1103/PhysRevB.97.024111

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title = "Formation of H2-rich iodine-hydrogen compounds at high pressure",

abstract = "We have used synchrotron x-ray and Raman spectroscopic studies combined with molecular dynamics to investigate the I-2-H-2 system at high pressure. By laser heating the mixture above 25 GPa we synthesized the molecular compound HI(H-2)(13), with the AB(13) structure type and unusually high volumetric hydrogen content. The isolation of HI molecules by (H-2)(13) supramolecular clusters stabilizes the compound over a remarkable pressure range from 9 to at least 130 GPa. At lower pressures and 300 K another compound, hydrogen diiodane H-2(HI)(2), spontaneously forms, being stable up to 12.5 GPa.",

keywords = "METAL-ORGANIC FRAMEWORKS, X-RAY-DIFFRACTION, MOLECULAR DISSOCIATION, DENSE HYDROGEN, SOLID IODINE, STORAGE, PHASE, DEUTERIUM, SPECTRA, SYSTEM",

author = "Jack Binns and Philip Dalladay-Simpson and Mengnan Wang and Graeme Ackland and Eugene Gregoryanz and Howie, {Ross T.}",

year = "2018",

month = jan,

day = "24",

doi = "10.1103/PhysRevB.97.024111",

language = "English",

volume = "97",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

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T1 - Formation of H2-rich iodine-hydrogen compounds at high pressure

AU - Binns, Jack

AU - Dalladay-Simpson, Philip

AU - Wang, Mengnan

AU - Ackland, Graeme

AU - Gregoryanz, Eugene

AU - Howie, Ross T.

PY - 2018/1/24

Y1 - 2018/1/24

N2 - We have used synchrotron x-ray and Raman spectroscopic studies combined with molecular dynamics to investigate the I-2-H-2 system at high pressure. By laser heating the mixture above 25 GPa we synthesized the molecular compound HI(H-2)(13), with the AB(13) structure type and unusually high volumetric hydrogen content. The isolation of HI molecules by (H-2)(13) supramolecular clusters stabilizes the compound over a remarkable pressure range from 9 to at least 130 GPa. At lower pressures and 300 K another compound, hydrogen diiodane H-2(HI)(2), spontaneously forms, being stable up to 12.5 GPa.

AB - We have used synchrotron x-ray and Raman spectroscopic studies combined with molecular dynamics to investigate the I-2-H-2 system at high pressure. By laser heating the mixture above 25 GPa we synthesized the molecular compound HI(H-2)(13), with the AB(13) structure type and unusually high volumetric hydrogen content. The isolation of HI molecules by (H-2)(13) supramolecular clusters stabilizes the compound over a remarkable pressure range from 9 to at least 130 GPa. At lower pressures and 300 K another compound, hydrogen diiodane H-2(HI)(2), spontaneously forms, being stable up to 12.5 GPa.

KW - METAL-ORGANIC FRAMEWORKS

KW - X-RAY-DIFFRACTION

KW - MOLECULAR DISSOCIATION

KW - DENSE HYDROGEN

KW - SOLID IODINE

KW - STORAGE

KW - PHASE

KW - DEUTERIUM

KW - SPECTRA

KW - SYSTEM

U2 - 10.1103/PhysRevB.97.024111

DO - 10.1103/PhysRevB.97.024111

M3 - Article

SN - 2469-9950

VL - 97

JO - Physical Review B

JF - Physical Review B

IS - 2

M1 - 024111

ER -

Formation of H2-rich iodine-hydrogen compounds at high pressure

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Keywords / Materials (for Non-textual outputs)

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