The compound described by KSmP2S7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded to one S(1), one S(6), two equivalent S(3), two equivalent S(5), and two equivalent S(7) atoms to form distorted KS8 hexagonal bipyramids that share  a cornercorner with one P(2)S4 tetrahedra, corners with four equivalent P(1)S4 tetrahedra, edges with three equivalent K(1)S8 hexagonal bipyramids, and edges with two equivalent P(2)S4 tetrahedra. Sm(1) is bonded in a 8-coordinate geometry to one S(1), one S(3), one S(5), one S(7), two equivalent S(2), and two equivalent S(4) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one S(1), one S(4), one S(6), and one S(7) atom to form PS4 tetrahedra that share corners with four equivalent K(1)S8 hexagonal bipyramids and  a cornercorner with one P(2)S4 tetrahedra. In the second P site, P(2) is bonded to one S(2), one S(3), one S(5), and one S(6) atom to form PS4 tetrahedra that share  a cornercorner with one K(1)S8 hexagonal bipyramid,  a cornercorner with one P(1)S4 tetrahedra, and edges with two equivalent K(1)S8 hexagonal bipyramids. There are seven inequivalent S sites. In the first S site, S(1) is bonded in a 3-coordinate geometry to one K(1), one Sm(1), and one P(1) atom. In the second S site, S(2) is bonded in a 3-coordinate geometry to two equivalent Sm(1) and one P(2) atom. In the third S site, S(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Sm(1), and one P(2) atom. In the fourth S site, S(4) is bonded in a distorted T-shaped geometry to two equivalent Sm(1) and one P(1) atom. In the fifth S site, S(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Sm(1), and one P(2) atom. In the sixth S site, S(6) is bonded in a 3-coordinate geometry to one K(1), one P(1), and one P(2) atom. In the seventh S site, S(7) is bonded to two equivalent K(1), one Sm(1), and one P(1) atom to form distorted corner-sharing SK2SmP trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSmP2S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.413
_cell_length_b   9.037
_cell_length_c   9.722
_cell_angle_alpha   89.760
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1090.540
_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  0.808  0.131  0.395  1.0
  K  K1  1  0.692  0.631  0.395  1.0
  K  K2  1  0.308  0.369  0.605  1.0
  K  K3  1  0.192  0.869  0.605  1.0
  Sm  Sm4  1  0.357  0.607  0.142  1.0
  Sm  Sm5  1  0.857  0.893  0.858  1.0
  Sm  Sm6  1  0.643  0.393  0.858  1.0
  Sm  Sm7  1  0.143  0.107  0.142  1.0
  P  P8  1  0.397  0.978  0.275  1.0
  P  P9  1  0.036  0.198  0.816  1.0
  P  P10  1  0.603  0.022  0.725  1.0
  P  P11  1  0.536  0.302  0.184  1.0
  P  P12  1  0.103  0.478  0.275  1.0
  P  P13  1  0.464  0.698  0.816  1.0
  P  P14  1  0.897  0.522  0.725  1.0
  P  P15  1  0.964  0.802  0.184  1.0
  S  S16  1  0.556  0.209  0.632  1.0
  S  S17  1  0.557  0.679  0.986  1.0
  S  S18  1  0.526  0.570  0.667  1.0
  S  S19  1  0.830  0.574  0.909  1.0
  S  S20  1  0.692  0.353  0.149  1.0
  S  S21  1  0.051  0.421  0.752  1.0
  S  S22  1  0.170  0.426  0.091  1.0
  S  S23  1  0.330  0.926  0.091  1.0
  S  S24  1  0.792  0.388  0.630  1.0
  S  S25  1  0.444  0.791  0.368  1.0
  S  S26  1  0.292  0.112  0.370  1.0
  S  S27  1  0.208  0.612  0.370  1.0
  S  S28  1  0.056  0.291  0.368  1.0
  S  S29  1  0.474  0.430  0.333  1.0
  S  S30  1  0.944  0.709  0.632  1.0
  S  S31  1  0.551  0.079  0.248  1.0
  S  S32  1  0.443  0.321  0.014  1.0
  S  S33  1  0.708  0.888  0.630  1.0
  S  S34  1  0.026  0.930  0.333  1.0
  S  S35  1  0.449  0.921  0.752  1.0
  S  S36  1  0.192  0.147  0.851  1.0
  S  S37  1  0.943  0.179  0.986  1.0
  S  S38  1  0.808  0.853  0.149  1.0
  S  S39  1  0.057  0.821  0.014  1.0
  S  S40  1  0.949  0.579  0.248  1.0
  S  S41  1  0.670  0.074  0.909  1.0
  S  S42  1  0.308  0.647  0.851  1.0
  S  S43  1  0.974  0.070  0.667  1.0
[/CIF]
.
The compound described by KSmP2S7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded to one S(1), one S(6), two equivalent S(3), two equivalent S(5), and two equivalent S(7) atoms to form distorted KS8 hexagonal bipyramids that share  a cornercorner with one P(2)S4 tetrahedra, corners with four equivalent P(1)S4 tetrahedra, edges with three equivalent K(1)S8 hexagonal bipyramids, and edges with two equivalent P(2)S4 tetrahedra. Sm(1) is bonded in a 8-coordinate geometry to one S(1), one S(3), one S(5), one S(7), two equivalent S(2), and two equivalent S(4) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one S(1), one S(4), one S(6), and one S(7) atom to form PS4 tetrahedra that share corners with four equivalent K(1)S8 hexagonal bipyramids and  a cornercorner with one P(2)S4 tetrahedra. In the second P site, P(2) is bonded to one S(2), one S(3), one S(5), and one S(6) atom to form PS4 tetrahedra that share  a cornercorner with one K(1)S8 hexagonal bipyramid,  a cornercorner with one P(1)S4 tetrahedra, and edges with two equivalent K(1)S8 hexagonal bipyramids. There are seven inequivalent S sites. In the first S site, S(1) is bonded in a 3-coordinate geometry to one K(1), one Sm(1), and one P(1) atom. In the second S site, S(2) is bonded in a 3-coordinate geometry to two equivalent Sm(1) and one P(2) atom. In the third S site, S(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Sm(1), and one P(2) atom. In the fourth S site, S(4) is bonded in a distorted T-shaped geometry to two equivalent Sm(1) and one P(1) atom. In the fifth S site, S(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Sm(1), and one P(2) atom. In the sixth S site, S(6) is bonded in a 3-coordinate geometry to one K(1), one P(1), and one P(2) atom. In the seventh S site, S(7) is bonded to two equivalent K(1), one Sm(1), and one P(1) atom to form distorted corner-sharing SK2SmP trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSmP2S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.413
_cell_length_b   9.037
_cell_length_c   9.722
_cell_angle_alpha   89.760
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1090.540
_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  0.808  0.131  0.395  1.0
  K  K1  1  0.692  0.631  0.395  1.0
  K  K2  1  0.308  0.369  0.605  1.0
  K  K3  1  0.192  0.869  0.605  1.0
  Sm  Sm4  1  0.357  0.607  0.142  1.0
  Sm  Sm5  1  0.857  0.893  0.858  1.0
  Sm  Sm6  1  0.643  0.393  0.858  1.0
  Sm  Sm7  1  0.143  0.107  0.142  1.0
  P  P8  1  0.397  0.978  0.275  1.0
  P  P9  1  0.036  0.198  0.816  1.0
  P  P10  1  0.603  0.022  0.725  1.0
  P  P11  1  0.536  0.302  0.184  1.0
  P  P12  1  0.103  0.478  0.275  1.0
  P  P13  1  0.464  0.698  0.816  1.0
  P  P14  1  0.897  0.522  0.725  1.0
  P  P15  1  0.964  0.802  0.184  1.0
  S  S16  1  0.556  0.209  0.632  1.0
  S  S17  1  0.557  0.679  0.986  1.0
  S  S18  1  0.526  0.570  0.667  1.0
  S  S19  1  0.830  0.574  0.909  1.0
  S  S20  1  0.692  0.353  0.149  1.0
  S  S21  1  0.051  0.421  0.752  1.0
  S  S22  1  0.170  0.426  0.091  1.0
  S  S23  1  0.330  0.926  0.091  1.0
  S  S24  1  0.792  0.388  0.630  1.0
  S  S25  1  0.444  0.791  0.368  1.0
  S  S26  1  0.292  0.112  0.370  1.0
  S  S27  1  0.208  0.612  0.370  1.0
  S  S28  1  0.056  0.291  0.368  1.0
  S  S29  1  0.474  0.430  0.333  1.0
  S  S30  1  0.944  0.709  0.632  1.0
  S  S31  1  0.551  0.079  0.248  1.0
  S  S32  1  0.443  0.321  0.014  1.0
  S  S33  1  0.708  0.888  0.630  1.0
  S  S34  1  0.026  0.930  0.333  1.0
  S  S35  1  0.449  0.921  0.752  1.0
  S  S36  1  0.192  0.147  0.851  1.0
  S  S37  1  0.943  0.179  0.986  1.0
  S  S38  1  0.808  0.853  0.149  1.0
  S  S39  1  0.057  0.821  0.014  1.0
  S  S40  1  0.949  0.579  0.248  1.0
  S  S41  1  0.670  0.074  0.909  1.0
  S  S42  1  0.308  0.647  0.851  1.0
  S  S43  1  0.974  0.070  0.667  1.0
[/CIF]
.