New Phases and Dissociation-Recombination of Hydrogen Deuteride to 3.4 Mbar.

We present infrared absorption studies of solid hydrogen deuteride to pressures as high as 340 GPa (100  GPa=1  Mbar) in a diamond anvil cell and temperatures in the range 5-295 K. Above 198 GPa the HD sample transforms to a mixture of HD, H_{2}, and D_{2}, interpreted as a process of dissociation and recombination. Three new phase lines are observed, two of which differ remarkably from those of the high-pressure homonuclear species, but none are metallic. The time-dependent spectral changes are analyzed to determine the molecular concentrations as a function of time; the nucleon exchange achieves steady state concentrations in ∼20  h at ∼200  GPa.

• Publication year

  2015

• Venue

  Physical Review Letters

• Publication date

  2015-10-19

• Fields of study

  Materials Science, Physics, Medicine

• Identifiers
  DOI 10.1103/PhysRevLett.116.145501arXiv 1510.05686PMID 27104717
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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