Static compression of LiH to 250 GPa

A. Lazicki, P. Loubeyre, F. Occelli, Russell J. Hemley, and M. Mezouar
Phys. Rev. B 85, 054103 – Published 6 February 2012

Abstract

The equation of state of LiH was extended to 252 GPa (V/V0=32%) at room temperature using x-ray diffraction in diamond-anvil cells. LiH was shown to remain in the the NaCl (B1) structure under these conditions, and the predicted B1-B2 phase transition well known in neighboring alkali halides was not observed. Raman spectroscopy performed up to 120 GPa revealed all transverse and acoustic phonon modes at the X point of reciprocal space. The structural, equation of state and thermodynamic properties clarified in this study enable the benchmarking of current theoretical models.

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  • Received 28 September 2011

DOI:https://doi.org/10.1103/PhysRevB.85.054103

©2012 American Physical Society

Authors & Affiliations

A. Lazicki1,*, P. Loubeyre1, F. Occelli1, Russell J. Hemley2, and M. Mezouar3

  • 1Département de Physique Théorique et Appliquée, CEA/DAM/DIF, F-91680 Bruyères-le-Châtel, France
  • 2Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20008, USA
  • 3ESRF, F-31800 Grenoble, France

  • *lazicki1@llnl.gov

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Vol. 85, Iss. 5 — 1 February 2012

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