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

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Original languageEnglish
Article number024111
Number of pages6
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume97
Issue number2
DOIs
StatePublished - 24 Jan 2018

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.

    Research areas

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

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