Materials Data on AgGe3 by Materials Project
AgGe3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ag is bonded to twelve Ge atoms to form AgGe12 cuboctahedra that share corners with four equivalent AgGe12 cuboctahedra, corners with eight equivalent GeAg4Ge8 cuboctahedra, edges with eight equivalent AgGe12 cuboctahedra, edges with sixteen equivalent GeAg4Ge8 cuboctahedra, faces with four equivalent AgGe12 cuboctahedra, and faces with fourteen GeAg4Ge8 cuboctahedra. There are four shorter (2.97 Å) and eight longer (3.07 Å) Ag–Ge bond lengths. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded to four equivalent Ag and eight Ge atoms to form GeAg4Ge8 cuboctahedra that share corners with twelve equivalent GeAg4Ge8 cuboctahedra, edges with eight equivalent AgGe12 cuboctahedra, edges with sixteen GeAg4Ge8 cuboctahedra, faces with four equivalent AgGe12 cuboctahedra, and faces with fourteen GeAg4Ge8 cuboctahedra. There are four shorter (2.97 Å) and four longer (3.07 Å) Ge–Ge bond lengths. In the second Ge site, Ge is bonded to four equivalent Ag and eight equivalent Ge atoms to form distorted GeAg4Ge8 cuboctahedra that share corners with four equivalent GeAg4Ge8 cuboctahedra, corners with eight equivalent AgGe12 cuboctahedra, edges with twenty-four GeAg4Ge8 cuboctahedra, faces with six equivalent AgGe12 cuboctahedra, and faces with twelve GeAg4Ge8 cuboctahedra.