Dy3CuSiS7 crystallizes in the hexagonal P6_3 space group. Dy(1) is bonded in a 8-coordinate geometry to one S(1), three equivalent S(3), and four equivalent S(2) atoms. Cu(1) is bonded in a trigonal planar geometry to three equivalent S(2) atoms. Si(1) is bonded in a tetrahedral geometry to one S(1) and three equivalent S(3) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted tetrahedral geometry to three equivalent Dy(1) and one Si(1) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to four equivalent Dy(1) and one Cu(1) atom. In the third S site, S(3) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Dy(1) and one Si(1) atom.
Dy3CuSiS7 crystallizes in the hexagonal P6_3 space group. Dy(1) is bonded in a 8-coordinate geometry to one S(1), three equivalent S(3), and four equivalent S(2) atoms. The Dy(1)-S(1) bond length is 2.96 Å. There are a spread of Dy(1)-S(3) bond distances ranging from 2.79-3.01 Å. There are a spread of Dy(1)-S(2) bond distances ranging from 2.76-3.13 Å. Cu(1) is bonded in a trigonal planar geometry to three equivalent S(2) atoms. All Cu(1)-S(2) bond lengths are 2.24 Å. Si(1) is bonded in a tetrahedral geometry to one S(1) and three equivalent S(3) atoms. The Si(1)-S(1) bond length is 2.11 Å. All Si(1)-S(3) bond lengths are 2.15 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted tetrahedral geometry to three equivalent Dy(1) and one Si(1) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to four equivalent Dy(1) and one Cu(1) atom. In the third S site, S(3) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Dy(1) and one Si(1) atom.