Extended Data Fig. 4: Raw XRD images of the other seven crystal grains measured at 212 GPa (a), 212 GPa (b), 213 GPa (c), 218 GPa (d), 223 GPa (e), 232 GPa (f), 243 GPa (g), and 233 GPa (h), respectively.
From: Ultrahigh-pressure crystallographic passage towards metallic hydrogen
Those XRD images were also merged from selected step scan images. Small boxes in XRD images mark the peak positions, with magnified views of the peaks in the red rectangles. Numbers are Miller indices in the \(\sqrt{3}\) × a 2 × c hexagonal supercell. Red indices mark peaks uniquely belonging to the \(\sqrt{3}\) × a 2 × c hexagonal supercell, while white indices mark peaks which are also allowed by the hcp symmetry.
