The crystal structure described by KNd3Te8 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one Te(1), one Te(6), two equivalent Te(5), two equivalent Te(7), and two equivalent Te(8) atoms. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 8-coordinate geometry to one Te(1), one Te(2), one Te(5), one Te(7), two equivalent Te(3), and two equivalent Te(4) atoms. In the second Nd site, Nd(2) is bonded in a 9-coordinate geometry to one Te(4), one Te(7), one Te(8), two equivalent Te(2), two equivalent Te(3), and two equivalent Te(6) atoms. In the third Nd site, Nd(3) is bonded in a 8-coordinate geometry to one Te(1), one Te(3), one Te(5), one Te(8), two equivalent Te(2), and two equivalent Te(4) atoms. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a 7-coordinate geometry to one K(1), one Nd(1), one Nd(3), one Te(7), one Te(8), and two equivalent Te(5) atoms. In the second Te site, Te(2) is bonded to one Nd(1), two equivalent Nd(2), and two equivalent Nd(3) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the third Te site, Te(3) is bonded to one Nd(3), two equivalent Nd(1), and two equivalent Nd(2) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the fourth Te site, Te(4) is bonded to one Nd(2), two equivalent Nd(1), and two equivalent Nd(3) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the fifth Te site, Te(5) is bonded in a 6-coordinate geometry to two equivalent K(1), one Nd(1), one Nd(3), and two equivalent Te(1) atoms. In the sixth Te site, Te(6) is bonded in a 5-coordinate geometry to one K(1), two equivalent Nd(2), two equivalent Te(7), and two equivalent Te(8) atoms. In the seventh Te site, Te(7) is bonded in a 7-coordinate geometry to two equivalent K(1), one Nd(1), one Nd(2), one Te(1), and two equivalent Te(6) atoms. In the eighth Te site, Te(8) is bonded in a 7-coordinate geometry to two equivalent K(1), one Nd(2), one Nd(3), one Te(1), and two equivalent Te(6) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_KNd3Te8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.964
_cell_length_b   9.023
_cell_length_c   14.209
_cell_angle_alpha   80.703
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1640.159
_cell_formula_units_Z   4
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  0.592  0.742  0.535  1.0
  K  K1  1  0.408  0.258  0.465  1.0
  K  K2  1  0.092  0.758  0.465  1.0
  K  K3  1  0.908  0.242  0.535  1.0
  Nd  Nd4  1  0.584  0.406  0.852  1.0
  Nd  Nd5  1  0.751  0.086  0.154  1.0
  Nd  Nd6  1  0.251  0.414  0.846  1.0
  Nd  Nd7  1  0.916  0.906  0.852  1.0
  Nd  Nd8  1  0.915  0.421  0.850  1.0
  Nd  Nd9  1  0.249  0.914  0.846  1.0
  Nd  Nd10  1  0.085  0.579  0.150  1.0
  Nd  Nd11  1  0.416  0.594  0.148  1.0
  Nd  Nd12  1  0.084  0.094  0.148  1.0
  Nd  Nd13  1  0.585  0.921  0.850  1.0
  Nd  Nd14  1  0.749  0.586  0.154  1.0
  Nd  Nd15  1  0.415  0.079  0.150  1.0
  Te  Te16  1  0.096  0.290  0.329  1.0
  Te  Te17  1  0.085  0.645  0.914  1.0
  Te  Te18  1  0.420  0.650  0.913  1.0
  Te  Te19  1  0.080  0.150  0.913  1.0
  Te  Te20  1  0.245  0.855  0.082  1.0
  Te  Te21  1  0.904  0.710  0.671  1.0
  Te  Te22  1  0.255  0.355  0.082  1.0
  Te  Te23  1  0.751  0.959  0.673  1.0
  Te  Te24  1  0.580  0.350  0.087  1.0
  Te  Te25  1  0.224  0.212  0.662  1.0
  Te  Te26  1  0.415  0.145  0.914  1.0
  Te  Te27  1  0.421  0.471  0.669  1.0
  Te  Te28  1  0.079  0.971  0.669  1.0
  Te  Te29  1  0.276  0.712  0.662  1.0
  Te  Te30  1  0.749  0.459  0.673  1.0
  Te  Te31  1  0.080  0.449  0.668  1.0
  Te  Te32  1  0.776  0.788  0.338  1.0
  Te  Te33  1  0.251  0.541  0.327  1.0
  Te  Te34  1  0.596  0.210  0.671  1.0
  Te  Te35  1  0.920  0.551  0.332  1.0
  Te  Te36  1  0.745  0.645  0.918  1.0
  Te  Te37  1  0.579  0.529  0.331  1.0
  Te  Te38  1  0.724  0.288  0.338  1.0
  Te  Te39  1  0.585  0.855  0.086  1.0
  Te  Te40  1  0.249  0.041  0.327  1.0
  Te  Te41  1  0.580  0.051  0.332  1.0
  Te  Te42  1  0.755  0.145  0.918  1.0
  Te  Te43  1  0.921  0.029  0.331  1.0
  Te  Te44  1  0.420  0.949  0.668  1.0
  Te  Te45  1  0.404  0.790  0.329  1.0
  Te  Te46  1  0.920  0.850  0.087  1.0
  Te  Te47  1  0.915  0.355  0.086  1.0
[/CIF]
.
The crystal structure described by KNd3Te8 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one Te(1), one Te(6), two equivalent Te(5), two equivalent Te(7), and two equivalent Te(8) atoms. There are three inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 8-coordinate geometry to one Te(1), one Te(2), one Te(5), one Te(7), two equivalent Te(3), and two equivalent Te(4) atoms. In the second Nd site, Nd(2) is bonded in a 9-coordinate geometry to one Te(4), one Te(7), one Te(8), two equivalent Te(2), two equivalent Te(3), and two equivalent Te(6) atoms. In the third Nd site, Nd(3) is bonded in a 8-coordinate geometry to one Te(1), one Te(3), one Te(5), one Te(8), two equivalent Te(2), and two equivalent Te(4) atoms. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a 7-coordinate geometry to one K(1), one Nd(1), one Nd(3), one Te(7), one Te(8), and two equivalent Te(5) atoms. In the second Te site, Te(2) is bonded to one Nd(1), two equivalent Nd(2), and two equivalent Nd(3) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the third Te site, Te(3) is bonded to one Nd(3), two equivalent Nd(1), and two equivalent Nd(2) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the fourth Te site, Te(4) is bonded to one Nd(2), two equivalent Nd(1), and two equivalent Nd(3) atoms to form a mixture of distorted corner and edge-sharing TeNd5 trigonal bipyramids. In the fifth Te site, Te(5) is bonded in a 6-coordinate geometry to two equivalent K(1), one Nd(1), one Nd(3), and two equivalent Te(1) atoms. In the sixth Te site, Te(6) is bonded in a 5-coordinate geometry to one K(1), two equivalent Nd(2), two equivalent Te(7), and two equivalent Te(8) atoms. In the seventh Te site, Te(7) is bonded in a 7-coordinate geometry to two equivalent K(1), one Nd(1), one Nd(2), one Te(1), and two equivalent Te(6) atoms. In the eighth Te site, Te(8) is bonded in a 7-coordinate geometry to two equivalent K(1), one Nd(2), one Nd(3), one Te(1), and two equivalent Te(6) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_KNd3Te8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.964
_cell_length_b   9.023
_cell_length_c   14.209
_cell_angle_alpha   80.703
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1640.159
_cell_formula_units_Z   4
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  0.592  0.742  0.535  1.0
  K  K1  1  0.408  0.258  0.465  1.0
  K  K2  1  0.092  0.758  0.465  1.0
  K  K3  1  0.908  0.242  0.535  1.0
  Nd  Nd4  1  0.584  0.406  0.852  1.0
  Nd  Nd5  1  0.751  0.086  0.154  1.0
  Nd  Nd6  1  0.251  0.414  0.846  1.0
  Nd  Nd7  1  0.916  0.906  0.852  1.0
  Nd  Nd8  1  0.915  0.421  0.850  1.0
  Nd  Nd9  1  0.249  0.914  0.846  1.0
  Nd  Nd10  1  0.085  0.579  0.150  1.0
  Nd  Nd11  1  0.416  0.594  0.148  1.0
  Nd  Nd12  1  0.084  0.094  0.148  1.0
  Nd  Nd13  1  0.585  0.921  0.850  1.0
  Nd  Nd14  1  0.749  0.586  0.154  1.0
  Nd  Nd15  1  0.415  0.079  0.150  1.0
  Te  Te16  1  0.096  0.290  0.329  1.0
  Te  Te17  1  0.085  0.645  0.914  1.0
  Te  Te18  1  0.420  0.650  0.913  1.0
  Te  Te19  1  0.080  0.150  0.913  1.0
  Te  Te20  1  0.245  0.855  0.082  1.0
  Te  Te21  1  0.904  0.710  0.671  1.0
  Te  Te22  1  0.255  0.355  0.082  1.0
  Te  Te23  1  0.751  0.959  0.673  1.0
  Te  Te24  1  0.580  0.350  0.087  1.0
  Te  Te25  1  0.224  0.212  0.662  1.0
  Te  Te26  1  0.415  0.145  0.914  1.0
  Te  Te27  1  0.421  0.471  0.669  1.0
  Te  Te28  1  0.079  0.971  0.669  1.0
  Te  Te29  1  0.276  0.712  0.662  1.0
  Te  Te30  1  0.749  0.459  0.673  1.0
  Te  Te31  1  0.080  0.449  0.668  1.0
  Te  Te32  1  0.776  0.788  0.338  1.0
  Te  Te33  1  0.251  0.541  0.327  1.0
  Te  Te34  1  0.596  0.210  0.671  1.0
  Te  Te35  1  0.920  0.551  0.332  1.0
  Te  Te36  1  0.745  0.645  0.918  1.0
  Te  Te37  1  0.579  0.529  0.331  1.0
  Te  Te38  1  0.724  0.288  0.338  1.0
  Te  Te39  1  0.585  0.855  0.086  1.0
  Te  Te40  1  0.249  0.041  0.327  1.0
  Te  Te41  1  0.580  0.051  0.332  1.0
  Te  Te42  1  0.755  0.145  0.918  1.0
  Te  Te43  1  0.921  0.029  0.331  1.0
  Te  Te44  1  0.420  0.949  0.668  1.0
  Te  Te45  1  0.404  0.790  0.329  1.0
  Te  Te46  1  0.920  0.850  0.087  1.0
  Te  Te47  1  0.915  0.355  0.086  1.0
[/CIF]
.