Dy2Cu(SiO3)4 crystallizes in the triclinic P-1 space group. Dy(1) is bonded in a 7-coordinate geometry to one O(1), one O(4), one O(5), two equivalent O(3), and two equivalent O(6) atoms. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Dy(1), one Cu(1), and one Si(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Dy(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Dy(1), one Cu(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Dy(1), one Si(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Dy(1) and one Si(2) atom.
Dy2Cu(SiO3)4 crystallizes in the triclinic P-1 space group. Dy(1) is bonded in a 7-coordinate geometry to one O(1), one O(4), one O(5), two equivalent O(3), and two equivalent O(6) atoms. The Dy(1)-O(1) bond length is 2.23 Å. The Dy(1)-O(4) bond length is 2.27 Å. The Dy(1)-O(5) bond length is 2.78 Å. There is one shorter (2.27 Å) and one longer (2.32 Å) Dy(1)-O(3) bond length. There is one shorter (2.29 Å) and one longer (2.38 Å) Dy(1)-O(6) bond length. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. Both Cu(1)-O(1) bond lengths are 1.98 Å. Both Cu(1)-O(4) bond lengths are 1.99 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form corner-sharing SiO4 tetrahedra. The Si(1)-O(1) bond length is 1.63 Å. The Si(1)-O(2) bond length is 1.65 Å. The Si(1)-O(3) bond length is 1.62 Å. The Si(1)-O(5) bond length is 1.67 Å. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. The Si(2)-O(2) bond length is 1.65 Å. The Si(2)-O(4) bond length is 1.63 Å. The Si(2)-O(5) bond length is 1.67 Å. The Si(2)-O(6) bond length is 1.63 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Dy(1), one Cu(1), and one Si(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Dy(1) and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Dy(1), one Cu(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Dy(1), one Si(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Dy(1) and one Si(2) atom.