“…For Au 2 S, there were some reports where Au 2 S has several phases. [7][8][9] In particular, a structure of Au 2 S [P4/nmm (129)], which consists of the square Au lattice networks and S adatoms as shown in Fig. 1(a), is comprehended as a distorted structure of Au 2 S [P42 1 2 (90)].…”