Nd2Al3Ge is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to two equivalent Al(3), four equivalent Al(1), four equivalent Al(2), and two equivalent Ge(1) atoms to form NdAl10Ge2 cuboctahedra that share edges with four equivalent Nd(1)Al10Ge2 cuboctahedra, edges with eight equivalent Nd(2)Al8Ge4 cuboctahedra, faces with four equivalent Nd(1)Al10Ge2 cuboctahedra, and faces with four equivalent Nd(2)Al8Ge4 cuboctahedra. In the second Nd site, Nd(2) is bonded to two equivalent Al(1), two equivalent Al(2), four equivalent Al(3), and four equivalent Ge(1) atoms to form NdAl8Ge4 cuboctahedra that share edges with four equivalent Nd(2)Al8Ge4 cuboctahedra, edges with eight equivalent Nd(1)Al10Ge2 cuboctahedra, faces with four equivalent Nd(1)Al10Ge2 cuboctahedra, and faces with four equivalent Nd(2)Al8Ge4 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), four equivalent Nd(1), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Nd(2), four equivalent Nd(1), one Al(1), and two equivalent Ge(1) atoms. In the third Al site, Al(3) is bonded in a distorted single-bond geometry to two equivalent Nd(1), four equivalent Nd(2), two equivalent Al(1), and one Ge(1) atom. Ge(1) is bonded in a distorted trigonal planar geometry to two equivalent Nd(1), four equivalent Nd(2), one Al(3), and two equivalent Al(2) atoms.
Nd2Al3Ge is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Nd sites. In the first Nd site, Nd(1) is bonded to two equivalent Al(3), four equivalent Al(1), four equivalent Al(2), and two equivalent Ge(1) atoms to form NdAl10Ge2 cuboctahedra that share edges with four equivalent Nd(1)Al10Ge2 cuboctahedra, edges with eight equivalent Nd(2)Al8Ge4 cuboctahedra, faces with four equivalent Nd(1)Al10Ge2 cuboctahedra, and faces with four equivalent Nd(2)Al8Ge4 cuboctahedra. Both Nd(1)-Al(3) bond lengths are 3.33 Å. All Nd(1)-Al(1) bond lengths are 3.31 Å. All Nd(1)-Al(2) bond lengths are 3.28 Å. Both Nd(1)-Ge(1) bond lengths are 3.28 Å. In the second Nd site, Nd(2) is bonded to two equivalent Al(1), two equivalent Al(2), four equivalent Al(3), and four equivalent Ge(1) atoms to form NdAl8Ge4 cuboctahedra that share edges with four equivalent Nd(2)Al8Ge4 cuboctahedra, edges with eight equivalent Nd(1)Al10Ge2 cuboctahedra, faces with four equivalent Nd(1)Al10Ge2 cuboctahedra, and faces with four equivalent Nd(2)Al8Ge4 cuboctahedra. Both Nd(2)-Al(1) bond lengths are 3.31 Å. Both Nd(2)-Al(2) bond lengths are 3.27 Å. All Nd(2)-Al(3) bond lengths are 3.30 Å. All Nd(2)-Ge(1) bond lengths are 3.27 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Nd(2), four equivalent Nd(1), one Al(2), and two equivalent Al(3) atoms. The Al(1)-Al(2) bond length is 2.51 Å. Both Al(1)-Al(3) bond lengths are 2.49 Å. In the second Al site, Al(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Nd(2), four equivalent Nd(1), one Al(1), and two equivalent Ge(1) atoms. Both Al(2)-Ge(1) bond lengths are 2.51 Å. In the third Al site, Al(3) is bonded in a distorted single-bond geometry to two equivalent Nd(1), four equivalent Nd(2), two equivalent Al(1), and one Ge(1) atom. The Al(3)-Ge(1) bond length is 2.47 Å. Ge(1) is bonded in a distorted trigonal planar geometry to two equivalent Nd(1), four equivalent Nd(2), one Al(3), and two equivalent Al(2) atoms.