Y6Mn11S20 crystallizes in the monoclinic C2/m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 8-coordinate geometry to one S(2), one S(6), three equivalent S(1), and three equivalent S(5) atoms. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one S(1), one S(4), three equivalent S(2), and three equivalent S(3) atoms. In the third Y site, Y(3) is bonded in a 8-coordinate geometry to one S(2), three equivalent S(3), and four equivalent S(4) atoms. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a distorted square co-planar geometry to one S(5), one S(6), one S(7), and one S(8) atom. In the second Mn site, Mn(2) is bonded in a distorted rectangular see-saw-like geometry to one S(1), one S(5), one S(6), and one S(7) atom. In the third Mn site, Mn(3) is bonded in a distorted square co-planar geometry to one S(6), one S(7), one S(8), and one S(9) atom. In the fourth Mn site, Mn(4) is bonded in a distorted square co-planar geometry to one S(10), one S(7), one S(8), and one S(9) atom. In the fifth Mn site, Mn(5) is bonded in a distorted square co-planar geometry to two equivalent S(10) and two equivalent S(9) atoms. In the sixth Mn site, Mn(6) is bonded in a distorted square co-planar geometry to one S(8), one S(9), and two equivalent S(10) atoms. There are ten inequivalent S sites. In the first S site, S(1) is bonded to one Y(2), three equivalent Y(1), and one Mn(2) atom to form distorted SY4Mn trigonal bipyramids that share  a cornercorner with one S(4)Y5 trigonal bipyramid, corners with six equivalent S(1)Y4Mn trigonal bipyramids, and edges with three equivalent S(2)Y5 trigonal bipyramids. In the second S site, S(2) is bonded to one Y(1), one Y(3), and three equivalent Y(2) atoms to form distorted SY5 trigonal bipyramids that share  a cornercorner with one S(4)Y5 trigonal bipyramid, corners with six equivalent S(2)Y5 trigonal bipyramids, edges with three equivalent S(1)Y4Mn trigonal bipyramids, and edges with three equivalent S(4)Y5 trigonal bipyramids. In the third S site, S(3) is bonded in a distorted linear geometry to three equivalent Y(2) and three equivalent Y(3) atoms. In the fourth S site, S(4) is bonded to one Y(2) and four equivalent Y(3) atoms to form SY5 trigonal bipyramids that share  a cornercorner with one S(1)Y4Mn trigonal bipyramid,  a cornercorner with one S(2)Y5 trigonal bipyramid, corners with six equivalent S(4)Y5 trigonal bipyramids, edges with three equivalent S(2)Y5 trigonal bipyramids, and edges with three equivalent S(4)Y5 trigonal bipyramids. In the fifth S site, S(5) is bonded in a 3-coordinate geometry to three equivalent Y(1), one Mn(1), and one Mn(2) atom. In the sixth S site, S(6) is bonded in a distorted square co-planar geometry to one Y(1), one Mn(1), one Mn(2), and one Mn(3) atom. In the seventh S site, S(7) is bonded in a distorted square co-planar geometry to one Mn(1), one Mn(2), one Mn(3), and one Mn(4) atom. In the eighth S site, S(8) is bonded in a distorted square co-planar geometry to one Mn(1), one Mn(3), one Mn(4), and one Mn(6) atom. In the ninth S site, S(9) is bonded in a distorted square co-planar geometry to one Mn(3), one Mn(4), one Mn(5), and one Mn(6) atom. In the tenth S site, S(10) is bonded in a distorted square co-planar geometry to one Mn(4), one Mn(5), and two equivalent Mn(6) atoms.
Y6Mn11S20 crystallizes in the monoclinic C2/m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 8-coordinate geometry to one S(2), one S(6), three equivalent S(1), and three equivalent S(5) atoms. The Y(1)-S(2) bond length is 2.73 Å. The Y(1)-S(6) bond length is 2.82 Å. There is one shorter (2.76 Å) and two longer (3.01 Å) Y(1)-S(1) bond lengths. There is one shorter (2.70 Å) and two longer (3.34 Å) Y(1)-S(5) bond lengths. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one S(1), one S(4), three equivalent S(2), and three equivalent S(3) atoms. The Y(2)-S(1) bond length is 2.68 Å. The Y(2)-S(4) bond length is 3.04 Å. There is one shorter (2.74 Å) and two longer (3.01 Å) Y(2)-S(2) bond lengths. There is one shorter (2.61 Å) and two longer (3.41 Å) Y(2)-S(3) bond lengths. In the third Y site, Y(3) is bonded in a 8-coordinate geometry to one S(2), three equivalent S(3), and four equivalent S(4) atoms. The Y(3)-S(2) bond length is 3.08 Å. There is one shorter (2.60 Å) and two longer (3.45 Å) Y(3)-S(3) bond lengths. There are a spread of Y(3)-S(4) bond distances ranging from 2.69-2.99 Å. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a distorted square co-planar geometry to one S(5), one S(6), one S(7), and one S(8) atom. The Mn(1)-S(5) bond length is 2.41 Å. The Mn(1)-S(6) bond length is 2.50 Å. The Mn(1)-S(7) bond length is 2.57 Å. The Mn(1)-S(8) bond length is 2.45 Å. In the second Mn site, Mn(2) is bonded in a distorted rectangular see-saw-like geometry to one S(1), one S(5), one S(6), and one S(7) atom. The Mn(2)-S(1) bond length is 2.54 Å. The Mn(2)-S(5) bond length is 2.45 Å. The Mn(2)-S(6) bond length is 2.52 Å. The Mn(2)-S(7) bond length is 2.43 Å. In the third Mn site, Mn(3) is bonded in a distorted square co-planar geometry to one S(6), one S(7), one S(8), and one S(9) atom. The Mn(3)-S(6) bond length is 2.45 Å. The Mn(3)-S(7) bond length is 2.56 Å. The Mn(3)-S(8) bond length is 2.55 Å. The Mn(3)-S(9) bond length is 2.45 Å. In the fourth Mn site, Mn(4) is bonded in a distorted square co-planar geometry to one S(10), one S(7), one S(8), and one S(9) atom. The Mn(4)-S(10) bond length is 2.44 Å. The Mn(4)-S(7) bond length is 2.41 Å. The Mn(4)-S(8) bond length is 2.56 Å. The Mn(4)-S(9) bond length is 2.55 Å. In the fifth Mn site, Mn(5) is bonded in a distorted square co-planar geometry to two equivalent S(10) and two equivalent S(9) atoms. Both Mn(5)-S(10) bond lengths are 2.56 Å. Both Mn(5)-S(9) bond lengths are 2.44 Å. In the sixth Mn site, Mn(6) is bonded in a distorted square co-planar geometry to one S(8), one S(9), and two equivalent S(10) atoms. The Mn(6)-S(8) bond length is 2.44 Å. The Mn(6)-S(9) bond length is 2.56 Å. There is one shorter (2.45 Å) and one longer (2.57 Å) Mn(6)-S(10) bond length. There are ten inequivalent S sites. In the first S site, S(1) is bonded to one Y(2), three equivalent Y(1), and one Mn(2) atom to form distorted SY4Mn trigonal bipyramids that share  a cornercorner with one S(4)Y5 trigonal bipyramid, corners with six equivalent S(1)Y4Mn trigonal bipyramids, and edges with three equivalent S(2)Y5 trigonal bipyramids. In the second S site, S(2) is bonded to one Y(1), one Y(3), and three equivalent Y(2) atoms to form distorted SY5 trigonal bipyramids that share  a cornercorner with one S(4)Y5 trigonal bipyramid, corners with six equivalent S(2)Y5 trigonal bipyramids, edges with three equivalent S(1)Y4Mn trigonal bipyramids, and edges with three equivalent S(4)Y5 trigonal bipyramids. In the third S site, S(3) is bonded in a distorted linear geometry to three equivalent Y(2) and three equivalent Y(3) atoms. In the fourth S site, S(4) is bonded to one Y(2) and four equivalent Y(3) atoms to form SY5 trigonal bipyramids that share  a cornercorner with one S(1)Y4Mn trigonal bipyramid,  a cornercorner with one S(2)Y5 trigonal bipyramid, corners with six equivalent S(4)Y5 trigonal bipyramids, edges with three equivalent S(2)Y5 trigonal bipyramids, and edges with three equivalent S(4)Y5 trigonal bipyramids. In the fifth S site, S(5) is bonded in a 3-coordinate geometry to three equivalent Y(1), one Mn(1), and one Mn(2) atom. In the sixth S site, S(6) is bonded in a distorted square co-planar geometry to one Y(1), one Mn(1), one Mn(2), and one Mn(3) atom. In the seventh S site, S(7) is bonded in a distorted square co-planar geometry to one Mn(1), one Mn(2), one Mn(3), and one Mn(4) atom. In the eighth S site, S(8) is bonded in a distorted square co-planar geometry to one Mn(1), one Mn(3), one Mn(4), and one Mn(6) atom. In the ninth S site, S(9) is bonded in a distorted square co-planar geometry to one Mn(3), one Mn(4), one Mn(5), and one Mn(6) atom. In the tenth S site, S(10) is bonded in a distorted square co-planar geometry to one Mn(4), one Mn(5), and two equivalent Mn(6) atoms.