Fig. 3: Synchrotron X-ray diffraction patterns of polycrystalline KHgAs at different pressures up to 55.1 GPa (λ = 0.6199 Å).
From: Pressure-induced superconductivity in the nonsymmorphic topological insulator KHgAs

a XRD patterns at various pressures ranging from 0.9 GPa to 13 GPa. b XRD patterns at various pressures ranging from 16.3 GPa to 55.1 GPa. The peaks marked with inverted triangles, rhombi, asterisks, arrows, and solid circles denote the emerging new diffraction peaks.