Fig. 3: Analysis of experimental XRD patterns of Cmc21-BaH12 synthesized in DAC #B2.
From: Synthesis of molecular metallic barium superhydride: pseudocubic BaH12
a Le Bail refinement of pseudocubic Cmc21-BaH12 and bcc-W at 93 GPa. The experimental data, fitted line, and residues are shown in red, black, and green, respectively. Inset shows the 2D diffraction image. Weak reflections, indicated by asterisks, may correspond to the impurity: possibly P63/mmc or P63mc-BaH12. b, c Microphotographs of the culet of cell #B2 with the Ba/AB sample before and after the laser heating. d Experimental XRD patterns from cell #B2 at pressures decreasing from 138 to 111 GPa. e, f, g Powder X-ray diffraction images at 128, 111, and 75 GPa. Reflections corresponding to the crystallographic planes in the ideal \(Fm\bar 3m\)-BaH12 phase are indicated by arrows.
