Dy2Nb3Ge4 crystallizes in the orthorhombic Pnma space group. Dy(1) is bonded in a 7-coordinate geometry to one Ge(2), two equivalent Ge(1), and four equivalent Ge(3) atoms. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted corner-sharing NbGe6 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to one Ge(1), two equivalent Ge(2), and three equivalent Ge(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), two equivalent Nb(1), two equivalent Nb(2), and one Ge(2) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), two equivalent Nb(1), four equivalent Nb(2), and one Ge(1) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Nb(1), three equivalent Nb(2), and one Ge(3) atom.
Dy2Nb3Ge4 crystallizes in the orthorhombic Pnma space group. Dy(1) is bonded in a 7-coordinate geometry to one Ge(2), two equivalent Ge(1), and four equivalent Ge(3) atoms. The Dy(1)-Ge(2) bond length is 2.99 Å. There is one shorter (2.85 Å) and one longer (2.98 Å) Dy(1)-Ge(1) bond length. There are a spread of Dy(1)-Ge(3) bond distances ranging from 2.85-3.08 Å. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted corner-sharing NbGe6 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. There is one shorter (2.74 Å) and one longer (2.88 Å) Nb(1)-Ge(1) bond length. There is one shorter (2.74 Å) and one longer (2.77 Å) Nb(1)-Ge(2) bond length. Both Nb(1)-Ge(3) bond lengths are 2.83 Å. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to one Ge(1), two equivalent Ge(2), and three equivalent Ge(3) atoms. The Nb(2)-Ge(1) bond length is 2.79 Å. There is one shorter (2.64 Å) and one longer (2.71 Å) Nb(2)-Ge(2) bond length. There are a spread of Nb(2)-Ge(3) bond distances ranging from 2.65-2.78 Å. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Dy(1), two equivalent Nb(1), two equivalent Nb(2), and one Ge(2) atom. The Ge(1)-Ge(2) bond length is 2.61 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), two equivalent Nb(1), four equivalent Nb(2), and one Ge(1) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Nb(1), three equivalent Nb(2), and one Ge(3) atom. The Ge(3)-Ge(3) bond length is 2.74 Å.