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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Lazicki et al. (2012) studied this question.
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