In3Ge crystallizes in the hexagonal P6_3/mmc space group. In(1) is bonded to eight equivalent In(1) and four equivalent Ge(1) atoms to form distorted InIn8Ge4 cuboctahedra that share corners with four equivalent Ge(1)In12 cuboctahedra, corners with fourteen equivalent In(1)In8Ge4 cuboctahedra, edges with six equivalent Ge(1)In12 cuboctahedra, edges with twelve equivalent In(1)In8Ge4 cuboctahedra, faces with four equivalent Ge(1)In12 cuboctahedra, and faces with sixteen equivalent In(1)In8Ge4 cuboctahedra. Ge(1) is bonded to twelve equivalent In(1) atoms to form GeIn12 cuboctahedra that share corners with six equivalent Ge(1)In12 cuboctahedra, corners with twelve equivalent In(1)In8Ge4 cuboctahedra, edges with eighteen equivalent In(1)In8Ge4 cuboctahedra, faces with eight equivalent Ge(1)In12 cuboctahedra, and faces with twelve equivalent In(1)In8Ge4 cuboctahedra.
In3Ge crystallizes in the hexagonal P6_3/mmc space group. In(1) is bonded to eight equivalent In(1) and four equivalent Ge(1) atoms to form distorted InIn8Ge4 cuboctahedra that share corners with four equivalent Ge(1)In12 cuboctahedra, corners with fourteen equivalent In(1)In8Ge4 cuboctahedra, edges with six equivalent Ge(1)In12 cuboctahedra, edges with twelve equivalent In(1)In8Ge4 cuboctahedra, faces with four equivalent Ge(1)In12 cuboctahedra, and faces with sixteen equivalent In(1)In8Ge4 cuboctahedra. There are a spread of In(1)-In(1) bond distances ranging from 3.24-3.43 Å. There are two shorter (3.24 Å) and two longer (3.34 Å) In(1)-Ge(1) bond lengths. Ge(1) is bonded to twelve equivalent In(1) atoms to form GeIn12 cuboctahedra that share corners with six equivalent Ge(1)In12 cuboctahedra, corners with twelve equivalent In(1)In8Ge4 cuboctahedra, edges with eighteen equivalent In(1)In8Ge4 cuboctahedra, faces with eight equivalent Ge(1)In12 cuboctahedra, and faces with twelve equivalent In(1)In8Ge4 cuboctahedra.