Fe2Ge crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 14-coordinate geometry to two equivalent Fe(1), six equivalent Fe(2), and six equivalent Ge(1) atoms. In the second Fe site, Fe(2) is bonded to six equivalent Fe(1) and five equivalent Ge(1) atoms to form a mixture of distorted corner and face-sharing FeFe6Ge5 trigonal bipyramids. Ge(1) is bonded in a 11-coordinate geometry to five equivalent Fe(2) and six equivalent Fe(1) atoms.
Fe2Ge crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 14-coordinate geometry to two equivalent Fe(1), six equivalent Fe(2), and six equivalent Ge(1) atoms. Both Fe(1)-Fe(1) bond lengths are 2.50 Å. All Fe(1)-Fe(2) bond lengths are 2.69 Å. All Fe(1)-Ge(1) bond lengths are 2.69 Å. In the second Fe site, Fe(2) is bonded to six equivalent Fe(1) and five equivalent Ge(1) atoms to form a mixture of distorted corner and face-sharing FeFe6Ge5 trigonal bipyramids. There are three shorter (2.39 Å) and two longer (2.50 Å) Fe(2)-Ge(1) bond lengths. Ge(1) is bonded in a 11-coordinate geometry to five equivalent Fe(2) and six equivalent Fe(1) atoms.