EuAlGe crystallizes in the tetragonal I4_1md space group. There are three inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to six Al(1,1) and six Ge(1,1) atoms to form a mixture of face and edge-sharing EuAl6Ge6 cuboctahedra. In the second Eu site, Eu(1) is bonded to six Al(1,1) and six Ge(1,1) atoms to form a mixture of face and edge-sharing EuAl6Ge6 cuboctahedra. In the third Eu site, Eu(1) is bonded to six Al(1,1) and six Ge(1,1) atoms to form a mixture of face and edge-sharing EuAl6Ge6 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Ge(1,1) atoms. In the second Al site, Al(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Ge(1,1) atoms. In the third Al site, Al(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Ge(1,1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Al(1,1) atoms. In the second Ge site, Ge(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Al(1,1) atoms. In the third Ge site, Ge(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Al(1,1) atoms.
EuAlGe crystallizes in the tetragonal I4_1md space group. There are three inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to six Al(1,1) and six Ge(1,1) atoms to form a mixture of face and edge-sharing EuAl6Ge6 cuboctahedra. All Eu(1)-Al(1,1) bond lengths are 3.30 Å. There are two shorter (3.29 Å) and four longer (3.31 Å) Eu(1)-Ge(1,1) bond lengths. In the second Eu site, Eu(1) is bonded to six Al(1,1) and six Ge(1,1) atoms to form a mixture of face and edge-sharing EuAl6Ge6 cuboctahedra. All Eu(1)-Al(1,1) bond lengths are 3.30 Å. There are two shorter (3.29 Å) and four longer (3.31 Å) Eu(1)-Ge(1,1) bond lengths. In the third Eu site, Eu(1) is bonded to six Al(1,1) and six Ge(1,1) atoms to form a mixture of face and edge-sharing EuAl6Ge6 cuboctahedra. All Eu(1)-Al(1,1) bond lengths are 3.30 Å. There are two shorter (3.29 Å) and four longer (3.31 Å) Eu(1)-Ge(1,1) bond lengths. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Ge(1,1) atoms. There is one shorter (2.46 Å) and two longer (2.50 Å) Al(1)-Ge(1,1) bond lengths. In the second Al site, Al(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Ge(1,1) atoms. There is one shorter (2.46 Å) and two longer (2.50 Å) Al(1)-Ge(1,1) bond lengths. In the third Al site, Al(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Ge(1,1) atoms. Both Al(1)-Eu(1) bond lengths are 3.30 Å. There is one shorter (2.46 Å) and two longer (2.50 Å) Al(1)-Ge(1,1) bond lengths. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Al(1,1) atoms. In the second Ge site, Ge(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Al(1,1) atoms. In the third Ge site, Ge(1) is bonded in a distorted trigonal planar geometry to six Eu(1,1) and three Al(1,1) atoms. All Ge(1)-Eu(1) bond lengths are 3.31 Å. The Ge(1)-Al(1) bond length is 2.46 Å.