Dy2FeGa8 crystallizes in the tetragonal P4/mmm space group. Dy(1) is bonded to four Ga(1,1); four equivalent Ga(2); and four equivalent Ga(3) atoms to form DyGa12 cuboctahedra that share corners with eight equivalent Dy(1)Ga12 cuboctahedra, edges with eight equivalent Ga(2)Dy4Ga8 cuboctahedra, faces with four equivalent Ga(2)Dy4Ga8 cuboctahedra, and faces with five equivalent Dy(1)Ga12 cuboctahedra. Fe(1) is bonded in a body-centered cubic geometry to eight Ga(1,1) atoms. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to two equivalent Dy(1); two equivalent Fe(1); two equivalent Ga(3); and five Ga(1,1) atoms. In the second Ga site, Ga(1) is bonded in a 11-coordinate geometry to two equivalent Dy(1); two equivalent Fe(1); two equivalent Ga(3); and five Ga(1,1) atoms. In the third Ga site, Ga(2) is bonded to four equivalent Dy(1), four equivalent Ga(2), and four equivalent Ga(3) atoms to form distorted GaDy4Ga8 cuboctahedra that share corners with four equivalent Ga(2)Dy4Ga8 cuboctahedra, edges with eight equivalent Dy(1)Ga12 cuboctahedra, faces with four equivalent Dy(1)Ga12 cuboctahedra, and faces with eight equivalent Ga(2)Dy4Ga8 cuboctahedra. In the fourth Ga site, Ga(3) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Dy(1); four Ga(1,1); and four equivalent Ga(2) atoms.
Dy2FeGa8 crystallizes in the tetragonal P4/mmm space group. Dy(1) is bonded to four Ga(1,1); four equivalent Ga(2); and four equivalent Ga(3) atoms to form DyGa12 cuboctahedra that share corners with eight equivalent Dy(1)Ga12 cuboctahedra, edges with eight equivalent Ga(2)Dy4Ga8 cuboctahedra, faces with four equivalent Ga(2)Dy4Ga8 cuboctahedra, and faces with five equivalent Dy(1)Ga12 cuboctahedra. All Dy(1)-Ga(1,1) bond lengths are 3.00 Å. All Dy(1)-Ga(2) bond lengths are 3.06 Å. All Dy(1)-Ga(3) bond lengths are 3.02 Å. Fe(1) is bonded in a body-centered cubic geometry to eight Ga(1,1) atoms. All Fe(1)-Ga(1,1) bond lengths are 2.48 Å. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to two equivalent Dy(1); two equivalent Fe(1); two equivalent Ga(3); and five Ga(1,1) atoms. Both Ga(1)-Ga(3) bond lengths are 2.99 Å. There is one shorter (2.55 Å) and four longer (3.02 Å) Ga(1)-Ga(1,1) bond lengths. In the second Ga site, Ga(1) is bonded in a 11-coordinate geometry to two equivalent Dy(1); two equivalent Fe(1); two equivalent Ga(3); and five Ga(1,1) atoms. Both Ga(1)-Ga(3) bond lengths are 2.99 Å. The Ga(1)-Ga(1) bond length is 2.55 Å. In the third Ga site, Ga(2) is bonded to four equivalent Dy(1), four equivalent Ga(2), and four equivalent Ga(3) atoms to form distorted GaDy4Ga8 cuboctahedra that share corners with four equivalent Ga(2)Dy4Ga8 cuboctahedra, edges with eight equivalent Dy(1)Ga12 cuboctahedra, faces with four equivalent Dy(1)Ga12 cuboctahedra, and faces with eight equivalent Ga(2)Dy4Ga8 cuboctahedra. All Ga(2)-Ga(2) bond lengths are 3.02 Å. All Ga(2)-Ga(3) bond lengths are 3.07 Å. In the fourth Ga site, Ga(3) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Dy(1); four Ga(1,1); and four equivalent Ga(2) atoms.