What Is The Crystal Structure Of Gold Iodide?

Gold iodide has multiple crystal structures, including orthorhombic, tetragonal, and cubic. The most stable form is believed to be the orthorhombic structure, which consists of layers of I-Au-I sandwiched between layers of Au atoms. Each I-Au-I layer is composed of corner-sharing I2Au4 octahedra, with the Au atoms occupying the center and the iodine atoms located at the corners. Within the layers of Au atoms, there are weak interactions between neighboring atoms, resulting in a layered structure.