Crystal Structure of γ-Ag3SBr0.6I0.4

The crystal structure of γ-Ag 3 SBr 0.6 I 0.4 is investigated by X-ray diffraction at 16 K. The low-temperature γ-phase of Ag 3 SBr 0.6 I 0.4 belongs to an orthorhombic system with the space group C 2 v 7 - P n m 2 1 . From the results of Rietveld analysis, it is found that the γ-phase includes an ordered arrangement of Ag atoms. Silver atoms around S atoms construct a distorted octahedron in the crystal. The tetrahedron constructed by anions around Ag atoms is highly distorted.