Abstract
The equation of state of LiH was extended to 252 GPa () at room temperature using x-ray diffraction in diamond-anvil cells. LiH was shown to remain in the the NaCl (1) structure under these conditions, and the predicted - 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 point of reciprocal space. The structural, equation of state and thermodynamic properties clarified in this study enable the benchmarking of current theoretical models.
- Received 28 September 2011
DOI:https://doi.org/10.1103/PhysRevB.85.054103
©2012 American Physical Society