High-pressure synthesis of lithium hydride

Ross T. Howie*, Olga Narygina, Christophe L. Guillaume, Shaun Evans, Eugene Gregoryanz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

By compressing elemental lithium and hydrogen in a diamond anvil cell, we have synthesized lithium hydride (LiH) at pressures as low as 50 MPa at room temperature. Combined Raman spectroscopy and synchrotron x-ray diffraction measurements reveal that, once synthesized, LiH remains stable at 300 K up to 160 GPa in the presence of molecular hydrogen. The mixture of lithium hydride and molecular hydrogen and application of pressure alone cannot form a higher H-2 content hydride (LiHx, x > 1) as was suggested from the theoretical ab initio calculations and therefore, cannot be considered as a route to low-pressure hydrogen rich material metallization.

Original languageEnglish
Article number064108
Number of pages4
JournalPhysical review B: Condensed matter and materials physics
Volume86
Issue number6
DOIs
Publication statusPublished - 16 Aug 2012

Keywords

  • EQUATION-OF-STATE
  • X-RAY-DIFFRACTION
  • HYDROGEN STORAGE
  • METAL-HYDRIDES
  • GPA

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