Pr7(S2Cl3)3 is Baddeleyite-derived structured and crystallizes in the monoclinic P2/c space group. There are four inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to two equivalent S(1), two equivalent S(2), one Cl(2), and two equivalent Cl(1) atoms to form a mixture of distorted corner and edge-sharing PrS4Cl3 pentagonal bipyramids. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to two equivalent S(3), one Cl(5), two equivalent Cl(3), and two equivalent Cl(4) atoms. In the third Pr site, Pr(3) is bonded to two equivalent S(2), two equivalent S(3), one Cl(1), and two equivalent Cl(5) atoms to form a mixture of distorted corner and edge-sharing PrS4Cl3 pentagonal bipyramids. In the fourth Pr site, Pr(4) is bonded in a 8-coordinate geometry to four equivalent S(1) and four equivalent Cl(2) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Pr(1) and two equivalent Pr(4) atoms to form a mixture of corner and edge-sharing SPr4 tetrahedra. In the second S site, S(2) is bonded to two equivalent Pr(1) and two equivalent Pr(3) atoms to form a mixture of corner and edge-sharing SPr4 tetrahedra. In the third S site, S(3) is bonded to two equivalent Pr(2) and two equivalent Pr(3) atoms to form SPr4 tetrahedra that share corners with two equivalent S(2)Pr4 tetrahedra, corners with two equivalent Cl(3)Pr4 tetrahedra,  an edgeedge with one S(2)Pr4 tetrahedra,  an edgeedge with one Cl(3)Pr4 tetrahedra, and edges with two equivalent S(3)Pr4 tetrahedra. There are five inequivalent Cl sites. In the first Cl site, Cl(3) is bonded to four equivalent Pr(2) atoms to form ClPr4 tetrahedra that share corners with four equivalent S(3)Pr4 tetrahedra, edges with two equivalent S(3)Pr4 tetrahedra, and edges with two equivalent Cl(3)Pr4 tetrahedra. In the second Cl site, Cl(4) is bonded in a 2-coordinate geometry to two equivalent Pr(2) atoms. In the third Cl site, Cl(5) is bonded in a trigonal planar geometry to one Pr(2) and two equivalent Pr(3) atoms. In the fourth Cl site, Cl(1) is bonded in a distorted trigonal planar geometry to one Pr(3) and two equivalent Pr(1) atoms. In the fifth Cl site, Cl(2) is bonded in a distorted trigonal planar geometry to one Pr(1) and two equivalent Pr(4) atoms.
Pr7(S2Cl3)3 is Baddeleyite-derived structured and crystallizes in the monoclinic P2/c space group. There are four inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to two equivalent S(1), two equivalent S(2), one Cl(2), and two equivalent Cl(1) atoms to form a mixture of distorted corner and edge-sharing PrS4Cl3 pentagonal bipyramids. There is one shorter (2.80 Å) and one longer (2.86 Å) Pr(1)-S(1) bond length. There is one shorter (2.88 Å) and one longer (2.93 Å) Pr(1)-S(2) bond length. The Pr(1)-Cl(2) bond length is 2.80 Å. There is one shorter (3.00 Å) and one longer (3.06 Å) Pr(1)-Cl(1) bond length. In the second Pr site, Pr(2) is bonded in a 7-coordinate geometry to two equivalent S(3), one Cl(5), two equivalent Cl(3), and two equivalent Cl(4) atoms. There is one shorter (2.77 Å) and one longer (2.79 Å) Pr(2)-S(3) bond length. The Pr(2)-Cl(5) bond length is 2.89 Å. There is one shorter (3.03 Å) and one longer (3.04 Å) Pr(2)-Cl(3) bond length. Both Pr(2)-Cl(4) bond lengths are 2.86 Å. In the third Pr site, Pr(3) is bonded to two equivalent S(2), two equivalent S(3), one Cl(1), and two equivalent Cl(5) atoms to form a mixture of distorted corner and edge-sharing PrS4Cl3 pentagonal bipyramids. There is one shorter (2.77 Å) and one longer (2.79 Å) Pr(3)-S(2) bond length. There is one shorter (2.92 Å) and one longer (2.93 Å) Pr(3)-S(3) bond length. The Pr(3)-Cl(1) bond length is 2.90 Å. There is one shorter (2.98 Å) and one longer (3.00 Å) Pr(3)-Cl(5) bond length. In the fourth Pr site, Pr(4) is bonded in a 8-coordinate geometry to four equivalent S(1) and four equivalent Cl(2) atoms. There are two shorter (2.85 Å) and two longer (2.95 Å) Pr(4)-S(1) bond lengths. There are two shorter (2.93 Å) and two longer (3.23 Å) Pr(4)-Cl(2) bond lengths. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Pr(1) and two equivalent Pr(4) atoms to form a mixture of corner and edge-sharing SPr4 tetrahedra. In the second S site, S(2) is bonded to two equivalent Pr(1) and two equivalent Pr(3) atoms to form a mixture of corner and edge-sharing SPr4 tetrahedra. In the third S site, S(3) is bonded to two equivalent Pr(2) and two equivalent Pr(3) atoms to form SPr4 tetrahedra that share corners with two equivalent S(2)Pr4 tetrahedra, corners with two equivalent Cl(3)Pr4 tetrahedra,  an edgeedge with one S(2)Pr4 tetrahedra,  an edgeedge with one Cl(3)Pr4 tetrahedra, and edges with two equivalent S(3)Pr4 tetrahedra. There are five inequivalent Cl sites. In the first Cl site, Cl(3) is bonded to four equivalent Pr(2) atoms to form ClPr4 tetrahedra that share corners with four equivalent S(3)Pr4 tetrahedra, edges with two equivalent S(3)Pr4 tetrahedra, and edges with two equivalent Cl(3)Pr4 tetrahedra. In the second Cl site, Cl(4) is bonded in a 2-coordinate geometry to two equivalent Pr(2) atoms. In the third Cl site, Cl(5) is bonded in a trigonal planar geometry to one Pr(2) and two equivalent Pr(3) atoms. In the fourth Cl site, Cl(1) is bonded in a distorted trigonal planar geometry to one Pr(3) and two equivalent Pr(1) atoms. In the fifth Cl site, Cl(2) is bonded in a distorted trigonal planar geometry to one Pr(1) and two equivalent Pr(4) atoms.