Extended Data Fig. 1: Post-hcp data points in phase diagram.
From: Ultrahigh-pressure crystallographic passage towards metallic hydrogen
(a) Phase diagram of hydrogen. Lines represent phase boundary, stars represent pressure points at which SCXRD data indicate a post-hcp structure. All data were collected at room temperature. Similarity in colours of phases IV, IV’, and V represents their similarity in crystal structure as indicated by spectroscopic data. The drawing of this phase diagram takes references of previous studies11,18,20. (b) Enlarged view of the phase diagram included in the red dash box in (a).
