fig4

Figure 4. The structural modification of Ag₃BO₃-I and Ag₃BO₃-II under pressure. (A) The relative change of bond length and angle in Ag₃BO₃-I; (B) The schematic of ZAC in Ag₃BO₃-I; (C) The relative change of bond length and angle in Ag₃BO₃-II; (D) The schematic of NAC in Ag₃BO₃-II.