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同步辐射及其在无机材料中的应用进展
刘云鹏1(), 盛伟繁1,2, 吴忠华1,2()
Synchrotron Radiation and Its Applications Progress in Inorganic Materials
LIU Yunpeng1(), SHENG Weifan1,2, WU Zhonghua1,2()

图1. (BA)4AgBiBr8的原位高压衍射图谱及其晶体结构变化示意图[33]

Fig. 1. In situ high pressure XRD patterns of (BA)4AgBiBr8 and schematic illustration of crystal structure changes[33]
(a) Representative XRD patterns of (BA)4AgBiBr8 at selected pressures up to 25.0βGPa. The magnification factor of the peak intensities in the left panel is two times that of the right panel; (b) Crystal structure of (BA)4AgBiBr8 perpendicular to the c axis (perpendicular to a axis, phase II). Pink and green octahedra represent [AgBr6]5- and [BiBr6]3- octahedra, respectively; (c) Crystal structures of (BA)4AgBiBr8 along (100) ((001), Phase II) with increasing pressure. Ag-Br octahedra are shown in pink. Bi-Br octahedral are shown in green; (d)βIllustrations of Bi-Br1-Ag bond angle within the inorganic layers framework before and after the phase transition. (1 atm=1.01×105 Pa)