The structure described by Cs3Tm11Te18 crystallizes in the monoclinic C2/m space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a distorted body-centered cubic geometry to four equivalent Te(6) and four equivalent Te(7) atoms. In the second Cs site, Cs(2) is bonded in a 8-coordinate geometry to one Te(3), two equivalent Te(4), two equivalent Te(5), and three equivalent Te(9) atoms. There are six inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to two equivalent Te(2) and four equivalent Te(4) atoms to form a mixture of edge and corner-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the second Tm site, Tm(2) is bonded to one Te(1), one Te(5), two equivalent Te(2), and two equivalent Te(6) atoms to form a mixture of edge, corner, and face-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles range from 44-51°. In the third Tm site, Tm(3) is bonded to one Te(7), one Te(9), two equivalent Te(1), and two equivalent Te(3) atoms to form a mixture of edge and corner-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles are 48°. In the fourth Tm site, Tm(4) is bonded to one Te(3), one Te(6), two equivalent Te(5), and two equivalent Te(8) atoms to form a mixture of edge, corner, and face-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. In the fifth Tm site, Tm(5) is bonded to one Te(3), two equivalent Te(7), and three equivalent Te(8) atoms to form a mixture of edge, corner, and face-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. In the sixth Tm site, Tm(6) is bonded to one Te(1), one Te(4), two equivalent Te(2), and two equivalent Te(9) atoms to form a mixture of edge, corner, and face-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles are 44°. There are nine inequivalent Te sites. In the first Te site, Te(3) is bonded to one Cs(2), one Tm(4), one Tm(5), and two equivalent Tm(3) atoms to form distorted TeCsTm4 trigonal bipyramids that share  a cornercorner with one Te(9)Cs3Tm3 octahedra, corners with two equivalent Te(4)Cs2Tm3 square pyramids,  a cornercorner with one Te(8)Tm5 trigonal bipyramid, corners with two equivalent Te(3)CsTm4 trigonal bipyramids, edges with two equivalent Te(9)Cs3Tm3 octahedra, and edges with two equivalent Te(8)Tm5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 20°. In the second Te site, Te(4) is bonded to two equivalent Cs(2), one Tm(6), and two equivalent Tm(1) atoms to form distorted TeCs2Tm3 square pyramids that share corners with two equivalent Te(9)Cs3Tm3 octahedra, corners with two equivalent Te(4)Cs2Tm3 square pyramids, corners with two equivalent Te(3)CsTm4 trigonal bipyramids, corners with two equivalent Te(2)Tm5 trigonal bipyramids, edges with three equivalent Te(9)Cs3Tm3 octahedra, edges with three equivalent Te(4)Cs2Tm3 square pyramids, and edges with two equivalent Te(2)Tm5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 16°. In the third Te site, Te(5) is bonded in a 5-coordinate geometry to two equivalent Cs(2), one Tm(2), and two equivalent Tm(4) atoms. In the fourth Te site, Te(6) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one Tm(4), and two equivalent Tm(2) atoms. In the fifth Te site, Te(7) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one Tm(3), and two equivalent Tm(5) atoms. In the sixth Te site, Te(8) is bonded to two equivalent Tm(4) and three equivalent Tm(5) atoms to form distorted TeTm5 trigonal bipyramids that share  a cornercorner with one Te(3)CsTm4 trigonal bipyramid, edges with two equivalent Te(3)CsTm4 trigonal bipyramids, and edges with four equivalent Te(8)Tm5 trigonal bipyramids. In the seventh Te site, Te(9) is bonded to three equivalent Cs(2), one Tm(3), and two equivalent Tm(6) atoms to form distorted TeCs3Tm3 octahedra that share corners with two equivalent Te(4)Cs2Tm3 square pyramids,  a cornercorner with one Te(3)CsTm4 trigonal bipyramid, corners with two equivalent Te(2)Tm5 trigonal bipyramids, edges with four equivalent Te(9)Cs3Tm3 octahedra, edges with three equivalent Te(4)Cs2Tm3 square pyramids,  an edgeedge with one Te(2)Tm5 trigonal bipyramid, and edges with two equivalent Te(3)CsTm4 trigonal bipyramids. In the eighth Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one Tm(2), one Tm(6), and two equivalent Tm(3) atoms. In the ninth Te site, Te(2) is bonded to one Tm(1), two equivalent Tm(2), and two equivalent Tm(6) atoms to form distorted TeTm5 trigonal bipyramids that share corners with two equivalent Te(9)Cs3Tm3 octahedra, corners with two equivalent Te(4)Cs2Tm3 square pyramids,  a cornercorner with one Te(2)Tm5 trigonal bipyramid,  an edgeedge with one Te(9)Cs3Tm3 octahedra, edges with two equivalent Te(4)Cs2Tm3 square pyramids, and edges with two equivalent Te(2)Tm5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 6°. is represented by the CIF card [CIF]
data_Cs3Tm11Te18
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.583
_cell_length_b   13.583
_cell_length_c   20.331
_cell_angle_alpha   79.999
_cell_angle_beta   79.999
_cell_angle_gamma   18.460
_symmetry_Int_Tables_number   1
_cell_volume   1169.131
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Cs  Cs0  1  0.000  0.000  0.000  1.0
  Cs  Cs1  1  0.304  0.304  0.592  1.0
  Cs  Cs2  1  0.696  0.696  0.408  1.0
  Tm  Tm3  1  0.500  0.500  0.500  1.0
  Tm  Tm4  1  0.032  0.032  0.241  1.0
  Tm  Tm5  1  0.968  0.968  0.759  1.0
  Tm  Tm6  1  0.654  0.654  0.775  1.0
  Tm  Tm7  1  0.346  0.346  0.225  1.0
  Tm  Tm8  1  0.338  0.338  0.818  1.0
  Tm  Tm9  1  0.662  0.662  0.182  1.0
  Tm  Tm10  1  0.204  0.204  0.929  1.0
  Tm  Tm11  1  0.796  0.796  0.071  1.0
  Tm  Tm12  1  0.093  0.093  0.627  1.0
  Tm  Tm13  1  0.907  0.907  0.373  1.0
  Te  Te14  1  0.076  0.076  0.781  1.0
  Te  Te15  1  0.924  0.924  0.219  1.0
  Te  Te16  1  0.506  0.506  0.650  1.0
  Te  Te17  1  0.494  0.494  0.350  1.0
  Te  Te18  1  0.232  0.232  0.778  1.0
  Te  Te19  1  0.768  0.768  0.222  1.0
  Te  Te20  1  0.080  0.080  0.485  1.0
  Te  Te21  1  0.920  0.920  0.515  1.0
  Te  Te22  1  0.134  0.134  0.281  1.0
  Te  Te23  1  0.866  0.866  0.719  1.0
  Te  Te24  1  0.439  0.439  0.860  1.0
  Te  Te25  1  0.561  0.561  0.140  1.0
  Te  Te26  1  0.629  0.629  0.929  1.0
  Te  Te27  1  0.371  0.371  0.071  1.0
  Te  Te28  1  0.791  0.791  0.922  1.0
  Te  Te29  1  0.209  0.209  0.078  1.0
  Te  Te30  1  0.328  0.328  0.379  1.0
  Te  Te31  1  0.672  0.672  0.621  1.0
[/CIF]
.
The structure described by Cs3Tm11Te18 crystallizes in the monoclinic C2/m space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a distorted body-centered cubic geometry to four equivalent Te(6) and four equivalent Te(7) atoms. In the second Cs site, Cs(2) is bonded in a 8-coordinate geometry to one Te(3), two equivalent Te(4), two equivalent Te(5), and three equivalent Te(9) atoms. There are six inequivalent Tm sites. In the first Tm site, Tm(1) is bonded to two equivalent Te(2) and four equivalent Te(4) atoms to form a mixture of edge and corner-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the second Tm site, Tm(2) is bonded to one Te(1), one Te(5), two equivalent Te(2), and two equivalent Te(6) atoms to form a mixture of edge, corner, and face-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles range from 44-51°. In the third Tm site, Tm(3) is bonded to one Te(7), one Te(9), two equivalent Te(1), and two equivalent Te(3) atoms to form a mixture of edge and corner-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles are 48°. In the fourth Tm site, Tm(4) is bonded to one Te(3), one Te(6), two equivalent Te(5), and two equivalent Te(8) atoms to form a mixture of edge, corner, and face-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. In the fifth Tm site, Tm(5) is bonded to one Te(3), two equivalent Te(7), and three equivalent Te(8) atoms to form a mixture of edge, corner, and face-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. In the sixth Tm site, Tm(6) is bonded to one Te(1), one Te(4), two equivalent Te(2), and two equivalent Te(9) atoms to form a mixture of edge, corner, and face-sharing TmTe6 octahedra. The corner-sharing octahedral tilt angles are 44°. There are nine inequivalent Te sites. In the first Te site, Te(3) is bonded to one Cs(2), one Tm(4), one Tm(5), and two equivalent Tm(3) atoms to form distorted TeCsTm4 trigonal bipyramids that share  a cornercorner with one Te(9)Cs3Tm3 octahedra, corners with two equivalent Te(4)Cs2Tm3 square pyramids,  a cornercorner with one Te(8)Tm5 trigonal bipyramid, corners with two equivalent Te(3)CsTm4 trigonal bipyramids, edges with two equivalent Te(9)Cs3Tm3 octahedra, and edges with two equivalent Te(8)Tm5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 20°. In the second Te site, Te(4) is bonded to two equivalent Cs(2), one Tm(6), and two equivalent Tm(1) atoms to form distorted TeCs2Tm3 square pyramids that share corners with two equivalent Te(9)Cs3Tm3 octahedra, corners with two equivalent Te(4)Cs2Tm3 square pyramids, corners with two equivalent Te(3)CsTm4 trigonal bipyramids, corners with two equivalent Te(2)Tm5 trigonal bipyramids, edges with three equivalent Te(9)Cs3Tm3 octahedra, edges with three equivalent Te(4)Cs2Tm3 square pyramids, and edges with two equivalent Te(2)Tm5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 16°. In the third Te site, Te(5) is bonded in a 5-coordinate geometry to two equivalent Cs(2), one Tm(2), and two equivalent Tm(4) atoms. In the fourth Te site, Te(6) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one Tm(4), and two equivalent Tm(2) atoms. In the fifth Te site, Te(7) is bonded in a 5-coordinate geometry to two equivalent Cs(1), one Tm(3), and two equivalent Tm(5) atoms. In the sixth Te site, Te(8) is bonded to two equivalent Tm(4) and three equivalent Tm(5) atoms to form distorted TeTm5 trigonal bipyramids that share  a cornercorner with one Te(3)CsTm4 trigonal bipyramid, edges with two equivalent Te(3)CsTm4 trigonal bipyramids, and edges with four equivalent Te(8)Tm5 trigonal bipyramids. In the seventh Te site, Te(9) is bonded to three equivalent Cs(2), one Tm(3), and two equivalent Tm(6) atoms to form distorted TeCs3Tm3 octahedra that share corners with two equivalent Te(4)Cs2Tm3 square pyramids,  a cornercorner with one Te(3)CsTm4 trigonal bipyramid, corners with two equivalent Te(2)Tm5 trigonal bipyramids, edges with four equivalent Te(9)Cs3Tm3 octahedra, edges with three equivalent Te(4)Cs2Tm3 square pyramids,  an edgeedge with one Te(2)Tm5 trigonal bipyramid, and edges with two equivalent Te(3)CsTm4 trigonal bipyramids. In the eighth Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one Tm(2), one Tm(6), and two equivalent Tm(3) atoms. In the ninth Te site, Te(2) is bonded to one Tm(1), two equivalent Tm(2), and two equivalent Tm(6) atoms to form distorted TeTm5 trigonal bipyramids that share corners with two equivalent Te(9)Cs3Tm3 octahedra, corners with two equivalent Te(4)Cs2Tm3 square pyramids,  a cornercorner with one Te(2)Tm5 trigonal bipyramid,  an edgeedge with one Te(9)Cs3Tm3 octahedra, edges with two equivalent Te(4)Cs2Tm3 square pyramids, and edges with two equivalent Te(2)Tm5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 6°. is represented by the CIF card [CIF]
data_Cs3Tm11Te18
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.583
_cell_length_b   13.583
_cell_length_c   20.331
_cell_angle_alpha   79.999
_cell_angle_beta   79.999
_cell_angle_gamma   18.460
_symmetry_Int_Tables_number   1
_cell_volume   1169.131
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Cs  Cs0  1  0.000  0.000  0.000  1.0
  Cs  Cs1  1  0.304  0.304  0.592  1.0
  Cs  Cs2  1  0.696  0.696  0.408  1.0
  Tm  Tm3  1  0.500  0.500  0.500  1.0
  Tm  Tm4  1  0.032  0.032  0.241  1.0
  Tm  Tm5  1  0.968  0.968  0.759  1.0
  Tm  Tm6  1  0.654  0.654  0.775  1.0
  Tm  Tm7  1  0.346  0.346  0.225  1.0
  Tm  Tm8  1  0.338  0.338  0.818  1.0
  Tm  Tm9  1  0.662  0.662  0.182  1.0
  Tm  Tm10  1  0.204  0.204  0.929  1.0
  Tm  Tm11  1  0.796  0.796  0.071  1.0
  Tm  Tm12  1  0.093  0.093  0.627  1.0
  Tm  Tm13  1  0.907  0.907  0.373  1.0
  Te  Te14  1  0.076  0.076  0.781  1.0
  Te  Te15  1  0.924  0.924  0.219  1.0
  Te  Te16  1  0.506  0.506  0.650  1.0
  Te  Te17  1  0.494  0.494  0.350  1.0
  Te  Te18  1  0.232  0.232  0.778  1.0
  Te  Te19  1  0.768  0.768  0.222  1.0
  Te  Te20  1  0.080  0.080  0.485  1.0
  Te  Te21  1  0.920  0.920  0.515  1.0
  Te  Te22  1  0.134  0.134  0.281  1.0
  Te  Te23  1  0.866  0.866  0.719  1.0
  Te  Te24  1  0.439  0.439  0.860  1.0
  Te  Te25  1  0.561  0.561  0.140  1.0
  Te  Te26  1  0.629  0.629  0.929  1.0
  Te  Te27  1  0.371  0.371  0.071  1.0
  Te  Te28  1  0.791  0.791  0.922  1.0
  Te  Te29  1  0.209  0.209  0.078  1.0
  Te  Te30  1  0.328  0.328  0.379  1.0
  Te  Te31  1  0.672  0.672  0.621  1.0
[/CIF]
.