FeGe3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Fe(1) is bonded to twelve equivalent Ge(1) atoms to form FeGe12 cuboctahedra that share corners with six equivalent Fe(1)Ge12 cuboctahedra, corners with twelve equivalent Ge(1)Fe4Ge8 cuboctahedra, edges with eighteen equivalent Ge(1)Fe4Ge8 cuboctahedra, faces with eight equivalent Fe(1)Ge12 cuboctahedra, and faces with twelve equivalent Ge(1)Fe4Ge8 cuboctahedra. Ge(1) is bonded to four equivalent Fe(1) and eight equivalent Ge(1) atoms to form distorted GeFe4Ge8 cuboctahedra that share corners with four equivalent Fe(1)Ge12 cuboctahedra, corners with fourteen equivalent Ge(1)Fe4Ge8 cuboctahedra, edges with six equivalent Fe(1)Ge12 cuboctahedra, edges with twelve equivalent Ge(1)Fe4Ge8 cuboctahedra, faces with four equivalent Fe(1)Ge12 cuboctahedra, and faces with sixteen equivalent Ge(1)Fe4Ge8 cuboctahedra.
FeGe3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Fe(1) is bonded to twelve equivalent Ge(1) atoms to form FeGe12 cuboctahedra that share corners with six equivalent Fe(1)Ge12 cuboctahedra, corners with twelve equivalent Ge(1)Fe4Ge8 cuboctahedra, edges with eighteen equivalent Ge(1)Fe4Ge8 cuboctahedra, faces with eight equivalent Fe(1)Ge12 cuboctahedra, and faces with twelve equivalent Ge(1)Fe4Ge8 cuboctahedra. There are six shorter (2.83 Å) and six longer (2.85 Å) Fe(1)-Ge(1) bond lengths. Ge(1) is bonded to four equivalent Fe(1) and eight equivalent Ge(1) atoms to form distorted GeFe4Ge8 cuboctahedra that share corners with four equivalent Fe(1)Ge12 cuboctahedra, corners with fourteen equivalent Ge(1)Fe4Ge8 cuboctahedra, edges with six equivalent Fe(1)Ge12 cuboctahedra, edges with twelve equivalent Ge(1)Fe4Ge8 cuboctahedra, faces with four equivalent Fe(1)Ge12 cuboctahedra, and faces with sixteen equivalent Ge(1)Fe4Ge8 cuboctahedra. There are a spread of Ge(1)-Ge(1) bond distances ranging from 2.69-2.97 Å.