MgPr6(GeS7)2 crystallizes in the trigonal P3 space group. Mg(1) is bonded in an octahedral geometry to three equivalent S(1) and three equivalent S(2) atoms. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to one S(3), one S(6), two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms. In the second Pr site, Pr(2) is bonded in a 8-coordinate geometry to one S(4), one S(5), two equivalent S(1), two equivalent S(2), and two equivalent S(6) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to one S(3) and three equivalent S(5) atoms. In the second Ge site, Ge(2) is bonded in a tetrahedral geometry to one S(4) and three equivalent S(6) atoms. There are six inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1), two equivalent Pr(1), and two equivalent Pr(2) atoms to form distorted SPr4Mg trigonal bipyramids that share corners with two equivalent S(3)Pr3Ge tetrahedra, corners with two equivalent S(4)Pr3Ge tetrahedra, corners with two equivalent S(1)Pr4Mg trigonal bipyramids, and edges with two equivalent S(1)Pr4Mg trigonal bipyramids. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Pr(1), and two equivalent Pr(2) atoms. In the third S site, S(3) is bonded to three equivalent Pr(1) and one Ge(1) atom to form corner-sharing SPr3Ge tetrahedra. In the fourth S site, S(4) is bonded to three equivalent Pr(2) and one Ge(2) atom to form corner-sharing SPr3Ge tetrahedra. In the fifth S site, S(5) is bonded in a distorted rectangular see-saw-like geometry to one Pr(2), two equivalent Pr(1), and one Ge(1) atom. In the sixth S site, S(6) is bonded in a distorted rectangular see-saw-like geometry to one Pr(1), two equivalent Pr(2), and one Ge(2) atom.
MgPr6(GeS7)2 crystallizes in the trigonal P3 space group. Mg(1) is bonded in an octahedral geometry to three equivalent S(1) and three equivalent S(2) atoms. All Mg(1)-S(1) bond lengths are 2.63 Å. All Mg(1)-S(2) bond lengths are 2.62 Å. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to one S(3), one S(6), two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms. The Pr(1)-S(3) bond length is 3.06 Å. The Pr(1)-S(6) bond length is 3.07 Å. There is one shorter (2.86 Å) and one longer (2.88 Å) Pr(1)-S(1) bond length. There is one shorter (2.94 Å) and one longer (3.21 Å) Pr(1)-S(2) bond length. There is one shorter (2.91 Å) and one longer (2.99 Å) Pr(1)-S(5) bond length. In the second Pr site, Pr(2) is bonded in a 8-coordinate geometry to one S(4), one S(5), two equivalent S(1), two equivalent S(2), and two equivalent S(6) atoms. The Pr(2)-S(4) bond length is 3.06 Å. The Pr(2)-S(5) bond length is 3.04 Å. There is one shorter (3.02 Å) and one longer (3.12 Å) Pr(2)-S(1) bond length. There is one shorter (2.86 Å) and one longer (2.88 Å) Pr(2)-S(2) bond length. There is one shorter (2.91 Å) and one longer (3.00 Å) Pr(2)-S(6) bond length. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to one S(3) and three equivalent S(5) atoms. The Ge(1)-S(3) bond length is 2.17 Å. All Ge(1)-S(5) bond lengths are 2.23 Å. In the second Ge site, Ge(2) is bonded in a tetrahedral geometry to one S(4) and three equivalent S(6) atoms. The Ge(2)-S(4) bond length is 2.18 Å. All Ge(2)-S(6) bond lengths are 2.22 Å. There are six inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1), two equivalent Pr(1), and two equivalent Pr(2) atoms to form distorted SPr4Mg trigonal bipyramids that share corners with two equivalent S(3)Pr3Ge tetrahedra, corners with two equivalent S(4)Pr3Ge tetrahedra, corners with two equivalent S(1)Pr4Mg trigonal bipyramids, and edges with two equivalent S(1)Pr4Mg trigonal bipyramids. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent Pr(1), and two equivalent Pr(2) atoms. In the third S site, S(3) is bonded to three equivalent Pr(1) and one Ge(1) atom to form corner-sharing SPr3Ge tetrahedra. In the fourth S site, S(4) is bonded to three equivalent Pr(2) and one Ge(2) atom to form corner-sharing SPr3Ge tetrahedra. In the fifth S site, S(5) is bonded in a distorted rectangular see-saw-like geometry to one Pr(2), two equivalent Pr(1), and one Ge(1) atom. In the sixth S site, S(6) is bonded in a distorted rectangular see-saw-like geometry to one Pr(1), two equivalent Pr(2), and one Ge(2) atom.