The crystal structure described by K2SmP2S7 crystallizes in the monoclinic C2 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one S(3), one S(4), two equivalent S(1), two equivalent S(5), and two equivalent S(7) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(3), two equivalent S(4), and two equivalent S(6) atoms. Sm(1) is bonded in a 8-coordinate geometry to one S(1), one S(3), one S(4), one S(5), one S(6), one S(7), and two equivalent S(2) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one S(2), one S(3), one S(4), and one S(6) atom. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one P(2), one S(1), one S(5), and one S(7) atom. There are seven inequivalent S sites. In the first S site, S(1) is bonded in a distorted single-bond geometry to two equivalent K(1), one Sm(1), and one P(2) atom. In the second S site, S(2) is bonded in a distorted see-saw-like geometry to one K(2), two equivalent Sm(1), and one P(1) atom. In the third S site, S(3) is bonded to one K(1), two equivalent K(2), one Sm(1), and one P(1) atom to form distorted SK3SmP square pyramids that share corners with two equivalent S(3)K3SmP square pyramids, corners with four equivalent S(6)K2SmP trigonal pyramids, and  an edgeedge with one S(6)K2SmP trigonal pyramid. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to one K(1), two equivalent K(2), one Sm(1), and one P(1) atom. In the fifth S site, S(5) is bonded in a distorted 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 to two equivalent K(2), one Sm(1), and one P(1) atom to form distorted SK2SmP trigonal pyramids that share corners with four equivalent S(3)K3SmP square pyramids, corners with two equivalent S(6)K2SmP trigonal pyramids, and  an edgeedge with one S(3)K3SmP square pyramid. In the seventh S site, S(7) is bonded in a distorted see-saw-like geometry to two equivalent K(1), one Sm(1), and one P(2) atom. is represented by the CIF card [CIF]
data_K2SmP2S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.960
_cell_length_b   11.960
_cell_length_c   9.051
_cell_angle_alpha   83.241
_cell_angle_beta   83.241
_cell_angle_gamma   32.943
_symmetry_Int_Tables_number   1
_cell_volume   698.754
_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  0.572  0.313  0.698  1.0
  K  K1  1  0.818  0.554  0.879  1.0
  K  K2  1  0.687  0.428  0.302  1.0
  K  K3  1  0.446  0.182  0.121  1.0
  Sm  Sm4  1  0.950  0.729  0.533  1.0
  Sm  Sm5  1  0.271  0.050  0.467  1.0
  P  P6  1  0.422  0.122  0.707  1.0
  P  P7  1  0.878  0.578  0.293  1.0
  P  P8  1  0.115  0.855  0.387  1.0
  P  P9  1  0.145  0.885  0.613  1.0
  S  S10  1  0.191  0.928  0.243  1.0
  S  S11  1  0.494  0.077  0.481  1.0
  S  S12  1  0.923  0.506  0.519  1.0
  S  S13  1  0.075  0.306  0.195  1.0
  S  S14  1  0.072  0.809  0.757  1.0
  S  S15  1  0.588  0.783  0.231  1.0
  S  S16  1  0.947  0.184  0.616  1.0
  S  S17  1  0.217  0.412  0.769  1.0
  S  S18  1  0.318  0.050  0.769  1.0
  S  S19  1  0.816  0.053  0.384  1.0
  S  S20  1  0.301  0.561  0.388  1.0
  S  S21  1  0.950  0.682  0.231  1.0
  S  S22  1  0.439  0.699  0.612  1.0
  S  S23  1  0.694  0.925  0.805  1.0
[/CIF]
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The crystal structure described by K2SmP2S7 crystallizes in the monoclinic C2 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one S(3), one S(4), two equivalent S(1), two equivalent S(5), and two equivalent S(7) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(3), two equivalent S(4), and two equivalent S(6) atoms. Sm(1) is bonded in a 8-coordinate geometry to one S(1), one S(3), one S(4), one S(5), one S(6), one S(7), and two equivalent S(2) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one S(2), one S(3), one S(4), and one S(6) atom. In the second P site, P(2) is bonded in a distorted tetrahedral geometry to one P(2), one S(1), one S(5), and one S(7) atom. There are seven inequivalent S sites. In the first S site, S(1) is bonded in a distorted single-bond geometry to two equivalent K(1), one Sm(1), and one P(2) atom. In the second S site, S(2) is bonded in a distorted see-saw-like geometry to one K(2), two equivalent Sm(1), and one P(1) atom. In the third S site, S(3) is bonded to one K(1), two equivalent K(2), one Sm(1), and one P(1) atom to form distorted SK3SmP square pyramids that share corners with two equivalent S(3)K3SmP square pyramids, corners with four equivalent S(6)K2SmP trigonal pyramids, and  an edgeedge with one S(6)K2SmP trigonal pyramid. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to one K(1), two equivalent K(2), one Sm(1), and one P(1) atom. In the fifth S site, S(5) is bonded in a distorted 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 to two equivalent K(2), one Sm(1), and one P(1) atom to form distorted SK2SmP trigonal pyramids that share corners with four equivalent S(3)K3SmP square pyramids, corners with two equivalent S(6)K2SmP trigonal pyramids, and  an edgeedge with one S(3)K3SmP square pyramid. In the seventh S site, S(7) is bonded in a distorted see-saw-like geometry to two equivalent K(1), one Sm(1), and one P(2) atom. is represented by the CIF card [CIF]
data_K2SmP2S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.960
_cell_length_b   11.960
_cell_length_c   9.051
_cell_angle_alpha   83.241
_cell_angle_beta   83.241
_cell_angle_gamma   32.943
_symmetry_Int_Tables_number   1
_cell_volume   698.754
_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  0.572  0.313  0.698  1.0
  K  K1  1  0.818  0.554  0.879  1.0
  K  K2  1  0.687  0.428  0.302  1.0
  K  K3  1  0.446  0.182  0.121  1.0
  Sm  Sm4  1  0.950  0.729  0.533  1.0
  Sm  Sm5  1  0.271  0.050  0.467  1.0
  P  P6  1  0.422  0.122  0.707  1.0
  P  P7  1  0.878  0.578  0.293  1.0
  P  P8  1  0.115  0.855  0.387  1.0
  P  P9  1  0.145  0.885  0.613  1.0
  S  S10  1  0.191  0.928  0.243  1.0
  S  S11  1  0.494  0.077  0.481  1.0
  S  S12  1  0.923  0.506  0.519  1.0
  S  S13  1  0.075  0.306  0.195  1.0
  S  S14  1  0.072  0.809  0.757  1.0
  S  S15  1  0.588  0.783  0.231  1.0
  S  S16  1  0.947  0.184  0.616  1.0
  S  S17  1  0.217  0.412  0.769  1.0
  S  S18  1  0.318  0.050  0.769  1.0
  S  S19  1  0.816  0.053  0.384  1.0
  S  S20  1  0.301  0.561  0.388  1.0
  S  S21  1  0.950  0.682  0.231  1.0
  S  S22  1  0.439  0.699  0.612  1.0
  S  S23  1  0.694  0.925  0.805  1.0
[/CIF]
.