Sm3CuSnS7 crystallizes in the hexagonal P6_3 space group. Sm(1) is bonded in a 9-coordinate geometry to one Cu(1), one S(3), three equivalent S(1), and four equivalent S(2) atoms. Cu(1) is bonded in a trigonal planar geometry to three equivalent Sm(1) and three equivalent S(2) atoms. Sn(1) is bonded in a tetrahedral geometry to one S(3) and three equivalent S(1) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to three equivalent Sm(1) and one Sn(1) atom. In the second S site, S(2) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and one Cu(1) atom. In the third S site, S(3) is bonded in a tetrahedral geometry to three equivalent Sm(1) and one Sn(1) atom.
Sm3CuSnS7 crystallizes in the hexagonal P6_3 space group. Sm(1) is bonded in a 9-coordinate geometry to one Cu(1), one S(3), three equivalent S(1), and four equivalent S(2) atoms. The Sm(1)-Cu(1) bond length is 3.16 Å. The Sm(1)-S(3) bond length is 2.93 Å. There are a spread of Sm(1)-S(1) bond distances ranging from 2.90-3.11 Å. There are a spread of Sm(1)-S(2) bond distances ranging from 2.78-3.53 Å. Cu(1) is bonded in a trigonal planar geometry to three equivalent Sm(1) and three equivalent S(2) atoms. All Cu(1)-S(2) bond lengths are 2.25 Å. Sn(1) is bonded in a tetrahedral geometry to one S(3) and three equivalent S(1) atoms. The Sn(1)-S(3) bond length is 2.39 Å. All Sn(1)-S(1) bond lengths are 2.42 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to three equivalent Sm(1) and one Sn(1) atom. In the second S site, S(2) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and one Cu(1) atom. In the third S site, S(3) is bonded in a tetrahedral geometry to three equivalent Sm(1) and one Sn(1) atom.