K3DyCl6 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one Cl(1), one Cl(3), one Cl(5), one Cl(6), two equivalent Cl(2), and two equivalent Cl(4) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one Cl(2), one Cl(3), one Cl(5), two equivalent Cl(1), and two equivalent Cl(6) atoms. In the third K site, K(3) is bonded in a 8-coordinate geometry to one Cl(1), one Cl(2), one Cl(5), one Cl(6), two equivalent Cl(3), and two equivalent Cl(4) atoms. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in an octahedral geometry to two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(4) atoms. In the second Dy site, Dy(2) is bonded in an octahedral geometry to two equivalent Cl(1), two equivalent Cl(5), and two equivalent Cl(6) atoms. There are six inequivalent Cl sites. In the first Cl site, Cl(5) is bonded to one K(1), one K(2), one K(3), and one Dy(2) atom to form distorted ClK3Dy trigonal pyramids that share corners with two equivalent Cl(3)K4Dy trigonal bipyramids, corners with two equivalent Cl(4)K4Dy trigonal bipyramids,  a cornercorner with one Cl(5)K3Dy trigonal pyramid,  an edgeedge with one Cl(3)K4Dy trigonal bipyramid, and  an edgeedge with one Cl(4)K4Dy trigonal bipyramid. In the second Cl site, Cl(6) is bonded in a 5-coordinate geometry to one K(1), one K(3), two equivalent K(2), and one Dy(2) atom. In the third Cl site, Cl(1) is bonded in a 5-coordinate geometry to one K(1), one K(3), two equivalent K(2), and one Dy(2) atom. In the fourth Cl site, Cl(2) is bonded in a 5-coordinate geometry to one K(2), one K(3), two equivalent K(1), and one Dy(1) atom. In the fifth Cl site, Cl(3) is bonded to one K(1), one K(2), two equivalent K(3), and one Dy(1) atom to form distorted ClK4Dy trigonal bipyramids that share corners with two equivalent Cl(4)K4Dy trigonal bipyramids, corners with three equivalent Cl(3)K4Dy trigonal bipyramids, corners with two equivalent Cl(5)K3Dy trigonal pyramids, edges with three equivalent Cl(4)K4Dy trigonal bipyramids, and  an edgeedge with one Cl(5)K3Dy trigonal pyramid. In the sixth Cl site, Cl(4) is bonded to two equivalent K(1), two equivalent K(3), and one Dy(1) atom to form distorted ClK4Dy trigonal bipyramids that share  a cornercorner with one Cl(4)K4Dy trigonal bipyramid, corners with two equivalent Cl(3)K4Dy trigonal bipyramids, corners with two equivalent Cl(5)K3Dy trigonal pyramids, edges with two equivalent Cl(4)K4Dy trigonal bipyramids, edges with three equivalent Cl(3)K4Dy trigonal bipyramids, and  an edgeedge with one Cl(5)K3Dy trigonal pyramid.
K3DyCl6 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one Cl(1), one Cl(3), one Cl(5), one Cl(6), two equivalent Cl(2), and two equivalent Cl(4) atoms. The K(1)-Cl(1) bond length is 3.26 Å. The K(1)-Cl(3) bond length is 3.10 Å. The K(1)-Cl(5) bond length is 3.00 Å. The K(1)-Cl(6) bond length is 3.59 Å. There is one shorter (3.37 Å) and one longer (3.59 Å) K(1)-Cl(2) bond length. There is one shorter (3.23 Å) and one longer (3.26 Å) K(1)-Cl(4) bond length. In the second K site, K(2) is bonded in a 7-coordinate geometry to one Cl(2), one Cl(3), one Cl(5), two equivalent Cl(1), and two equivalent Cl(6) atoms. The K(2)-Cl(2) bond length is 3.67 Å. The K(2)-Cl(3) bond length is 3.35 Å. The K(2)-Cl(5) bond length is 3.17 Å. There is one shorter (3.27 Å) and one longer (3.62 Å) K(2)-Cl(1) bond length. There is one shorter (3.17 Å) and one longer (3.46 Å) K(2)-Cl(6) bond length. In the third K site, K(3) is bonded in a 8-coordinate geometry to one Cl(1), one Cl(2), one Cl(5), one Cl(6), two equivalent Cl(3), and two equivalent Cl(4) atoms. The K(3)-Cl(1) bond length is 3.39 Å. The K(3)-Cl(2) bond length is 3.16 Å. The K(3)-Cl(5) bond length is 3.14 Å. The K(3)-Cl(6) bond length is 3.25 Å. There is one shorter (3.31 Å) and one longer (3.57 Å) K(3)-Cl(3) bond length. There is one shorter (3.16 Å) and one longer (3.21 Å) K(3)-Cl(4) bond length. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in an octahedral geometry to two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(4) atoms. Both Dy(1)-Cl(2) bond lengths are 2.63 Å. Both Dy(1)-Cl(3) bond lengths are 2.64 Å. Both Dy(1)-Cl(4) bond lengths are 2.66 Å. In the second Dy site, Dy(2) is bonded in an octahedral geometry to two equivalent Cl(1), two equivalent Cl(5), and two equivalent Cl(6) atoms. Both Dy(2)-Cl(1) bond lengths are 2.60 Å. Both Dy(2)-Cl(5) bond lengths are 2.61 Å. Both Dy(2)-Cl(6) bond lengths are 2.67 Å. There are six inequivalent Cl sites. In the first Cl site, Cl(5) is bonded to one K(1), one K(2), one K(3), and one Dy(2) atom to form distorted ClK3Dy trigonal pyramids that share corners with two equivalent Cl(3)K4Dy trigonal bipyramids, corners with two equivalent Cl(4)K4Dy trigonal bipyramids,  a cornercorner with one Cl(5)K3Dy trigonal pyramid,  an edgeedge with one Cl(3)K4Dy trigonal bipyramid, and  an edgeedge with one Cl(4)K4Dy trigonal bipyramid. In the second Cl site, Cl(6) is bonded in a 5-coordinate geometry to one K(1), one K(3), two equivalent K(2), and one Dy(2) atom. In the third Cl site, Cl(1) is bonded in a 5-coordinate geometry to one K(1), one K(3), two equivalent K(2), and one Dy(2) atom. In the fourth Cl site, Cl(2) is bonded in a 5-coordinate geometry to one K(2), one K(3), two equivalent K(1), and one Dy(1) atom. In the fifth Cl site, Cl(3) is bonded to one K(1), one K(2), two equivalent K(3), and one Dy(1) atom to form distorted ClK4Dy trigonal bipyramids that share corners with two equivalent Cl(4)K4Dy trigonal bipyramids, corners with three equivalent Cl(3)K4Dy trigonal bipyramids, corners with two equivalent Cl(5)K3Dy trigonal pyramids, edges with three equivalent Cl(4)K4Dy trigonal bipyramids, and  an edgeedge with one Cl(5)K3Dy trigonal pyramid. In the sixth Cl site, Cl(4) is bonded to two equivalent K(1), two equivalent K(3), and one Dy(1) atom to form distorted ClK4Dy trigonal bipyramids that share  a cornercorner with one Cl(4)K4Dy trigonal bipyramid, corners with two equivalent Cl(3)K4Dy trigonal bipyramids, corners with two equivalent Cl(5)K3Dy trigonal pyramids, edges with two equivalent Cl(4)K4Dy trigonal bipyramids, edges with three equivalent Cl(3)K4Dy trigonal bipyramids, and  an edgeedge with one Cl(5)K3Dy trigonal pyramid.