Pr3CuSnS7 crystallizes in the hexagonal P6_3 space group. Pr(1) is bonded in a 9-coordinate geometry to one Cu(1), one S(3), three equivalent S(2), and four equivalent S(1) atoms. Cu(1) is bonded in a trigonal planar geometry to three equivalent Pr(1) and three equivalent S(1) atoms. Sn(1) is bonded in a tetrahedral geometry to one S(3) and three equivalent S(2) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to four equivalent Pr(1) and one Cu(1) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Pr(1) and one Sn(1) atom. In the third S site, S(3) is bonded in a tetrahedral geometry to three equivalent Pr(1) and one Sn(1) atom.
Pr3CuSnS7 crystallizes in the hexagonal P6_3 space group. Pr(1) is bonded in a 9-coordinate geometry to one Cu(1), one S(3), three equivalent S(2), and four equivalent S(1) atoms. The Pr(1)-Cu(1) bond length is 3.21 Å. The Pr(1)-S(3) bond length is 2.99 Å. There are a spread of Pr(1)-S(2) bond distances ranging from 2.95-3.14 Å. There are a spread of Pr(1)-S(1) bond distances ranging from 2.83-3.44 Å. Cu(1) is bonded in a trigonal planar geometry to three equivalent Pr(1) and three equivalent S(1) atoms. All Cu(1)-S(1) bond lengths are 2.26 Å. Sn(1) is bonded in a tetrahedral geometry to one S(3) and three equivalent S(2) atoms. The Sn(1)-S(3) bond length is 2.38 Å. All Sn(1)-S(2) bond lengths are 2.42 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to four equivalent Pr(1) and one Cu(1) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Pr(1) and one Sn(1) atom. In the third S site, S(3) is bonded in a tetrahedral geometry to three equivalent Pr(1) and one Sn(1) atom.