Dy2Rh12As7 crystallizes in the trigonal P3 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to six equivalent Rh(2) and six equivalent As(3) atoms to form distorted DyAs6Rh6 cuboctahedra that share corners with six equivalent Rh(3)As4 tetrahedra, corners with six equivalent Rh(4)As4 tetrahedra, edges with three equivalent Rh(3)As4 tetrahedra, and faces with two equivalent Dy(1)As6Rh6 cuboctahedra. In the second Dy site, Dy(2) is bonded to six equivalent Rh(1) and six equivalent As(2) atoms to form distorted DyAs6Rh6 cuboctahedra that share corners with six equivalent Rh(3)As4 tetrahedra, corners with six equivalent Rh(4)As4 tetrahedra, edges with three equivalent Rh(4)As4 tetrahedra, and faces with two equivalent Dy(2)As6Rh6 cuboctahedra. There are four inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 6-coordinate geometry to two equivalent Dy(2), two equivalent As(2), and two equivalent As(3) atoms. In the second Rh site, Rh(2) is bonded in a 6-coordinate geometry to two equivalent Dy(1), two equivalent As(2), and two equivalent As(3) atoms. In the third Rh site, Rh(3) is bonded to one As(1), one As(2), and two equivalent As(3) atoms to form distorted RhAs4 tetrahedra that share corners with two equivalent Dy(1)As6Rh6 cuboctahedra, corners with two equivalent Dy(2)As6Rh6 cuboctahedra, corners with three equivalent Rh(4)As4 tetrahedra, corners with four equivalent Rh(3)As4 tetrahedra,  an edgeedge with one Dy(1)As6Rh6 cuboctahedra, and edges with two equivalent Rh(4)As4 tetrahedra. In the fourth Rh site, Rh(4) is bonded to one As(1), one As(3), and two equivalent As(2) atoms to form distorted RhAs4 tetrahedra that share corners with two equivalent Dy(1)As6Rh6 cuboctahedra, corners with two equivalent Dy(2)As6Rh6 cuboctahedra, corners with three equivalent Rh(3)As4 tetrahedra, corners with four equivalent Rh(4)As4 tetrahedra,  an edgeedge with one Dy(2)As6Rh6 cuboctahedra, and edges with two equivalent Rh(3)As4 tetrahedra. There are three inequivalent As sites. In the first As site, As(1) is bonded in a distorted octahedral geometry to three equivalent Rh(3) and three equivalent Rh(4) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Dy(2), one Rh(3), two equivalent Rh(1), two equivalent Rh(2), and two equivalent Rh(4) atoms. In the third As site, As(3) is bonded in a 9-coordinate geometry to two equivalent Dy(1), one Rh(4), two equivalent Rh(1), two equivalent Rh(2), and two equivalent Rh(3) atoms.
Dy2Rh12As7 crystallizes in the trigonal P3 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to six equivalent Rh(2) and six equivalent As(3) atoms to form distorted DyAs6Rh6 cuboctahedra that share corners with six equivalent Rh(3)As4 tetrahedra, corners with six equivalent Rh(4)As4 tetrahedra, edges with three equivalent Rh(3)As4 tetrahedra, and faces with two equivalent Dy(1)As6Rh6 cuboctahedra. There are three shorter (3.11 Å) and three longer (3.12 Å) Dy(1)-Rh(2) bond lengths. There are three shorter (3.08 Å) and three longer (3.09 Å) Dy(1)-As(3) bond lengths. In the second Dy site, Dy(2) is bonded to six equivalent Rh(1) and six equivalent As(2) atoms to form distorted DyAs6Rh6 cuboctahedra that share corners with six equivalent Rh(3)As4 tetrahedra, corners with six equivalent Rh(4)As4 tetrahedra, edges with three equivalent Rh(4)As4 tetrahedra, and faces with two equivalent Dy(2)As6Rh6 cuboctahedra. There are three shorter (3.11 Å) and three longer (3.13 Å) Dy(2)-Rh(1) bond lengths. There are three shorter (3.07 Å) and three longer (3.09 Å) Dy(2)-As(2) bond lengths. There are four inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 6-coordinate geometry to two equivalent Dy(2), two equivalent As(2), and two equivalent As(3) atoms. There is one shorter (2.40 Å) and one longer (2.42 Å) Rh(1)-As(2) bond length. Both Rh(1)-As(3) bond lengths are 2.60 Å. In the second Rh site, Rh(2) is bonded in a 6-coordinate geometry to two equivalent Dy(1), two equivalent As(2), and two equivalent As(3) atoms. Both Rh(2)-As(2) bond lengths are 2.61 Å. There is one shorter (2.40 Å) and one longer (2.42 Å) Rh(2)-As(3) bond length. In the third Rh site, Rh(3) is bonded to one As(1), one As(2), and two equivalent As(3) atoms to form distorted RhAs4 tetrahedra that share corners with two equivalent Dy(1)As6Rh6 cuboctahedra, corners with two equivalent Dy(2)As6Rh6 cuboctahedra, corners with three equivalent Rh(4)As4 tetrahedra, corners with four equivalent Rh(3)As4 tetrahedra,  an edgeedge with one Dy(1)As6Rh6 cuboctahedra, and edges with two equivalent Rh(4)As4 tetrahedra. The Rh(3)-As(1) bond length is 2.46 Å. The Rh(3)-As(2) bond length is 2.42 Å. There is one shorter (2.49 Å) and one longer (2.52 Å) Rh(3)-As(3) bond length. In the fourth Rh site, Rh(4) is bonded to one As(1), one As(3), and two equivalent As(2) atoms to form distorted RhAs4 tetrahedra that share corners with two equivalent Dy(1)As6Rh6 cuboctahedra, corners with two equivalent Dy(2)As6Rh6 cuboctahedra, corners with three equivalent Rh(3)As4 tetrahedra, corners with four equivalent Rh(4)As4 tetrahedra,  an edgeedge with one Dy(2)As6Rh6 cuboctahedra, and edges with two equivalent Rh(3)As4 tetrahedra. The Rh(4)-As(1) bond length is 2.49 Å. The Rh(4)-As(3) bond length is 2.42 Å. There is one shorter (2.50 Å) and one longer (2.53 Å) Rh(4)-As(2) bond length. There are three inequivalent As sites. In the first As site, As(1) is bonded in a distorted octahedral geometry to three equivalent Rh(3) and three equivalent Rh(4) atoms. In the second As site, As(2) is bonded in a 9-coordinate geometry to two equivalent Dy(2), one Rh(3), two equivalent Rh(1), two equivalent Rh(2), and two equivalent Rh(4) atoms. In the third As site, As(3) is bonded in a 9-coordinate geometry to two equivalent Dy(1), one Rh(4), two equivalent Rh(1), two equivalent Rh(2), and two equivalent Rh(3) atoms.