Dy3Ge4 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(3), and four equivalent Ge(2) atoms. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to three equivalent Ge(1) and four equivalent Ge(2) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to three equivalent Dy(2), four equivalent Dy(1), and two equivalent Ge(2) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Dy(2), four equivalent Dy(1), one Ge(1), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 4-coordinate geometry to four equivalent Dy(1) and four equivalent Ge(2) atoms.
Dy3Ge4 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(3), and four equivalent Ge(2) atoms. Both Dy(1)-Ge(1) bond lengths are 3.04 Å. Both Dy(1)-Ge(3) bond lengths are 3.04 Å. There are a spread of Dy(1)-Ge(2) bond distances ranging from 2.97-3.08 Å. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to three equivalent Ge(1) and four equivalent Ge(2) atoms. There is one shorter (2.89 Å) and two longer (3.16 Å) Dy(2)-Ge(1) bond lengths. All Dy(2)-Ge(2) bond lengths are 2.96 Å. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to three equivalent Dy(2), four equivalent Dy(1), and two equivalent Ge(2) atoms. Both Ge(1)-Ge(2) bond lengths are 2.58 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Dy(2), four equivalent Dy(1), one Ge(1), and two equivalent Ge(3) atoms. Both Ge(2)-Ge(3) bond lengths are 2.85 Å. In the third Ge site, Ge(3) is bonded in a 4-coordinate geometry to four equivalent Dy(1) and four equivalent Ge(2) atoms.