Eu5Ge3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent Ge(2) and three equivalent Ge(1) atoms to form a mixture of distorted edge, face, and corner-sharing EuGe5 trigonal bipyramids. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to two equivalent Ge(2) and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Eu(2), six equivalent Eu(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 10-coordinate geometry to two equivalent Eu(2) and eight equivalent Eu(1) atoms.
Eu5Ge3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent Ge(2) and three equivalent Ge(1) atoms to form a mixture of distorted edge, face, and corner-sharing EuGe5 trigonal bipyramids. Both Eu(1)-Ge(2) bond lengths are 3.31 Å. All Eu(1)-Ge(1) bond lengths are 3.21 Å. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to two equivalent Ge(2) and four equivalent Ge(1) atoms. Both Eu(2)-Ge(2) bond lengths are 3.75 Å. All Eu(2)-Ge(1) bond lengths are 3.18 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Eu(2), six equivalent Eu(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.56 Å. In the second Ge site, Ge(2) is bonded in a 10-coordinate geometry to two equivalent Eu(2) and eight equivalent Eu(1) atoms.