The crystal structure described by K11Cd2Sb5 crystallizes in the triclinic P-1 space group. There are eleven inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one Cd(2), one Sb(2), one Sb(4), and two equivalent Sb(5) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to one Cd(1), one Cd(2), one Sb(1), one Sb(3), one Sb(4), and one Sb(5) atom. In the third K site, K(3) is bonded in a 4-coordinate geometry to one Sb(1), one Sb(2), and two equivalent Sb(3) atoms. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one Cd(1), one Cd(2), one Sb(1), one Sb(3), and two equivalent Sb(2) atoms. In the fifth K site, K(5) is bonded in a 6-coordinate geometry to two equivalent Cd(2), one Sb(2), one Sb(5), and two equivalent Sb(1) atoms. In the sixth K site, K(6) is bonded in a 1-coordinate geometry to one Cd(1), one Cd(2), one Sb(1), one Sb(2), one Sb(3), one Sb(4), and one Sb(5) atom. In the seventh K site, K(7) is bonded in a 6-coordinate geometry to two equivalent Cd(1), one Sb(3), one Sb(4), and two equivalent Sb(1) atoms. In the eighth K site, K(8) is bonded in a 5-coordinate geometry to one Cd(1), one Sb(3), one Sb(5), and two equivalent Sb(4) atoms. In the ninth K site, K(9) is bonded in a distorted tetrahedral geometry to one Sb(2), one Sb(3), one Sb(4), and one Sb(5) atom. In the tenth K site, K(10) is bonded in a 4-coordinate geometry to one Sb(2), one Sb(3), one Sb(4), and one Sb(5) atom. In the eleventh K site, K(11) is bonded in a distorted trigonal planar geometry to one Sb(2), one Sb(4), and one Sb(5) atom. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 9-coordinate geometry to one K(2), one K(4), one K(6), one K(8), two equivalent K(7), one Sb(1), one Sb(3), and one Sb(4) atom. In the second Cd site, Cd(2) is bonded in a 9-coordinate geometry to one K(1), one K(2), one K(4), one K(6), two equivalent K(5), one Sb(1), one Sb(2), and one Sb(5) atom. There are five inequivalent Sb sites. In the first Sb site, Sb(4) is bonded in a 10-coordinate geometry to one K(1), one K(10), one K(11), one K(2), one K(6), one K(7), one K(9), two equivalent K(8), and one Cd(1) atom. In the second Sb site, Sb(5) is bonded in a 10-coordinate geometry to one K(10), one K(11), one K(2), one K(5), one K(6), one K(8), one K(9), two equivalent K(1), and one Cd(2) atom. In the third Sb site, Sb(1) is bonded in a 10-coordinate geometry to one K(2), one K(3), one K(4), one K(6), two equivalent K(5), two equivalent K(7), one Cd(1), and one Cd(2) atom. In the fourth Sb site, Sb(2) is bonded in a 10-coordinate geometry to one K(1), one K(10), one K(11), one K(3), one K(5), one K(6), one K(9), two equivalent K(4), and one Cd(2) atom. In the fifth Sb site, Sb(3) is bonded in a 10-coordinate geometry to one K(10), one K(2), one K(4), one K(6), one K(7), one K(8), one K(9), two equivalent K(3), and one Cd(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K11Cd2Sb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.971
_cell_length_b   12.058
_cell_length_c   12.891
_cell_angle_alpha   103.557
_cell_angle_beta   97.178
_cell_angle_gamma   107.599
_symmetry_Int_Tables_number   1
_cell_volume   1403.695
_cell_formula_units_Z   2
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
  K  K0  1  0.858  0.574  0.963  1.0
  K  K1  1  0.142  0.426  0.037  1.0
  K  K2  1  0.305  0.894  0.776  1.0
  K  K3  1  0.695  0.106  0.224  1.0
  K  K4  1  0.633  0.166  0.531  1.0
  K  K5  1  0.367  0.834  0.469  1.0
  K  K6  1  0.635  0.674  0.560  1.0
  K  K7  1  0.365  0.326  0.440  1.0
  K  K8  1  0.203  0.558  0.571  1.0
  K  K9  1  0.797  0.442  0.429  1.0
  K  K10  1  0.050  0.706  0.269  1.0
  K  K11  1  0.950  0.294  0.731  1.0
  K  K12  1  0.203  0.079  0.570  1.0
  K  K13  1  0.797  0.921  0.430  1.0
  K  K14  1  0.876  0.095  0.983  1.0
  K  K15  1  0.124  0.905  0.017  1.0
  K  K16  1  0.587  0.227  0.864  1.0
  K  K17  1  0.413  0.773  0.136  1.0
  K  K18  1  0.393  0.248  0.141  1.0
  K  K19  1  0.607  0.752  0.859  1.0
  K  K20  1  0.350  0.412  0.790  1.0
  K  K21  1  0.650  0.588  0.210  1.0
  Cd  Cd22  1  0.946  0.959  0.719  1.0
  Cd  Cd23  1  0.054  0.041  0.281  1.0
  Cd  Cd24  1  0.946  0.624  0.715  1.0
  Cd  Cd25  1  0.054  0.376  0.285  1.0
  Sb  Sb26  1  0.001  0.765  0.555  1.0
  Sb  Sb27  1  0.999  0.235  0.445  1.0
  Sb  Sb28  1  0.661  0.456  0.692  1.0
  Sb  Sb29  1  0.339  0.544  0.308  1.0
  Sb  Sb30  1  0.663  0.973  0.700  1.0
  Sb  Sb31  1  0.337  0.027  0.300  1.0
  Sb  Sb32  1  0.192  0.148  0.866  1.0
  Sb  Sb33  1  0.808  0.852  0.134  1.0
  Sb  Sb34  1  0.190  0.631  0.865  1.0
  Sb  Sb35  1  0.810  0.369  0.135  1.0
[/CIF]
.
The crystal structure described by K11Cd2Sb5 crystallizes in the triclinic P-1 space group. There are eleven inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one Cd(2), one Sb(2), one Sb(4), and two equivalent Sb(5) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to one Cd(1), one Cd(2), one Sb(1), one Sb(3), one Sb(4), and one Sb(5) atom. In the third K site, K(3) is bonded in a 4-coordinate geometry to one Sb(1), one Sb(2), and two equivalent Sb(3) atoms. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one Cd(1), one Cd(2), one Sb(1), one Sb(3), and two equivalent Sb(2) atoms. In the fifth K site, K(5) is bonded in a 6-coordinate geometry to two equivalent Cd(2), one Sb(2), one Sb(5), and two equivalent Sb(1) atoms. In the sixth K site, K(6) is bonded in a 1-coordinate geometry to one Cd(1), one Cd(2), one Sb(1), one Sb(2), one Sb(3), one Sb(4), and one Sb(5) atom. In the seventh K site, K(7) is bonded in a 6-coordinate geometry to two equivalent Cd(1), one Sb(3), one Sb(4), and two equivalent Sb(1) atoms. In the eighth K site, K(8) is bonded in a 5-coordinate geometry to one Cd(1), one Sb(3), one Sb(5), and two equivalent Sb(4) atoms. In the ninth K site, K(9) is bonded in a distorted tetrahedral geometry to one Sb(2), one Sb(3), one Sb(4), and one Sb(5) atom. In the tenth K site, K(10) is bonded in a 4-coordinate geometry to one Sb(2), one Sb(3), one Sb(4), and one Sb(5) atom. In the eleventh K site, K(11) is bonded in a distorted trigonal planar geometry to one Sb(2), one Sb(4), and one Sb(5) atom. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 9-coordinate geometry to one K(2), one K(4), one K(6), one K(8), two equivalent K(7), one Sb(1), one Sb(3), and one Sb(4) atom. In the second Cd site, Cd(2) is bonded in a 9-coordinate geometry to one K(1), one K(2), one K(4), one K(6), two equivalent K(5), one Sb(1), one Sb(2), and one Sb(5) atom. There are five inequivalent Sb sites. In the first Sb site, Sb(4) is bonded in a 10-coordinate geometry to one K(1), one K(10), one K(11), one K(2), one K(6), one K(7), one K(9), two equivalent K(8), and one Cd(1) atom. In the second Sb site, Sb(5) is bonded in a 10-coordinate geometry to one K(10), one K(11), one K(2), one K(5), one K(6), one K(8), one K(9), two equivalent K(1), and one Cd(2) atom. In the third Sb site, Sb(1) is bonded in a 10-coordinate geometry to one K(2), one K(3), one K(4), one K(6), two equivalent K(5), two equivalent K(7), one Cd(1), and one Cd(2) atom. In the fourth Sb site, Sb(2) is bonded in a 10-coordinate geometry to one K(1), one K(10), one K(11), one K(3), one K(5), one K(6), one K(9), two equivalent K(4), and one Cd(2) atom. In the fifth Sb site, Sb(3) is bonded in a 10-coordinate geometry to one K(10), one K(2), one K(4), one K(6), one K(7), one K(8), one K(9), two equivalent K(3), and one Cd(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K11Cd2Sb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.971
_cell_length_b   12.058
_cell_length_c   12.891
_cell_angle_alpha   103.557
_cell_angle_beta   97.178
_cell_angle_gamma   107.599
_symmetry_Int_Tables_number   1
_cell_volume   1403.695
_cell_formula_units_Z   2
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
  K  K0  1  0.858  0.574  0.963  1.0
  K  K1  1  0.142  0.426  0.037  1.0
  K  K2  1  0.305  0.894  0.776  1.0
  K  K3  1  0.695  0.106  0.224  1.0
  K  K4  1  0.633  0.166  0.531  1.0
  K  K5  1  0.367  0.834  0.469  1.0
  K  K6  1  0.635  0.674  0.560  1.0
  K  K7  1  0.365  0.326  0.440  1.0
  K  K8  1  0.203  0.558  0.571  1.0
  K  K9  1  0.797  0.442  0.429  1.0
  K  K10  1  0.050  0.706  0.269  1.0
  K  K11  1  0.950  0.294  0.731  1.0
  K  K12  1  0.203  0.079  0.570  1.0
  K  K13  1  0.797  0.921  0.430  1.0
  K  K14  1  0.876  0.095  0.983  1.0
  K  K15  1  0.124  0.905  0.017  1.0
  K  K16  1  0.587  0.227  0.864  1.0
  K  K17  1  0.413  0.773  0.136  1.0
  K  K18  1  0.393  0.248  0.141  1.0
  K  K19  1  0.607  0.752  0.859  1.0
  K  K20  1  0.350  0.412  0.790  1.0
  K  K21  1  0.650  0.588  0.210  1.0
  Cd  Cd22  1  0.946  0.959  0.719  1.0
  Cd  Cd23  1  0.054  0.041  0.281  1.0
  Cd  Cd24  1  0.946  0.624  0.715  1.0
  Cd  Cd25  1  0.054  0.376  0.285  1.0
  Sb  Sb26  1  0.001  0.765  0.555  1.0
  Sb  Sb27  1  0.999  0.235  0.445  1.0
  Sb  Sb28  1  0.661  0.456  0.692  1.0
  Sb  Sb29  1  0.339  0.544  0.308  1.0
  Sb  Sb30  1  0.663  0.973  0.700  1.0
  Sb  Sb31  1  0.337  0.027  0.300  1.0
  Sb  Sb32  1  0.192  0.148  0.866  1.0
  Sb  Sb33  1  0.808  0.852  0.134  1.0
  Sb  Sb34  1  0.190  0.631  0.865  1.0
  Sb  Sb35  1  0.810  0.369  0.135  1.0
[/CIF]
.