The compound described by KBiP2S7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one S(6), one S(7), two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms. Bi(1) is bonded to one S(1), one S(2), one S(3), one S(5), one S(7), and two equivalent S(4) atoms to form distorted BiS7 pentagonal bipyramids that share corners with two equivalent Bi(1)S7 pentagonal bipyramids,  a cornercorner with one P(2)S4 tetrahedra,  an edgeedge with one P(2)S4 tetrahedra, and edges with two equivalent P(1)S4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one S(2), one S(4), one S(6), and one S(7) atom to form PS4 tetrahedra that share  a cornercorner with one P(2)S4 tetrahedra and edges with two equivalent Bi(1)S7 pentagonal bipyramids. In the second P site, P(2) is bonded to one S(1), one S(3), one S(5), and one S(6) atom to form PS4 tetrahedra that share  a cornercorner with one Bi(1)S7 pentagonal bipyramid,  a cornercorner with one P(1)S4 tetrahedra, and  an edgeedge with one Bi(1)S7 pentagonal bipyramid. There are seven inequivalent S sites. In the first S site, S(5) is bonded in an L-shaped geometry to one Bi(1) and one P(2) atom. In the second S site, S(6) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(1), and one P(2) atom. In the third S site, S(7) is bonded in a distorted T-shaped geometry to one K(1), one Bi(1), and one P(1) atom. In the fourth S site, S(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Bi(1), and one P(2) atom. In the fifth S site, S(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Bi(1), and one P(1) atom. In the sixth S site, S(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Bi(1), and one P(2) atom. In the seventh S site, S(4) is bonded in a 3-coordinate geometry to two equivalent Bi(1) and one P(1) atom. is represented by the CIF file [CIF]
data_KBiP2S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.744
_cell_length_b   9.238
_cell_length_c   9.777
_cell_angle_alpha   89.579
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1151.083
_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  0.688  0.626  0.888  1.0
  K  K1  1  0.188  0.874  0.112  1.0
  K  K2  1  0.312  0.374  0.112  1.0
  K  K3  1  0.812  0.126  0.888  1.0
  Bi  Bi4  1  0.637  0.374  0.348  1.0
  Bi  Bi5  1  0.137  0.126  0.652  1.0
  Bi  Bi6  1  0.363  0.626  0.652  1.0
  Bi  Bi7  1  0.863  0.874  0.348  1.0
  P  P8  1  0.609  0.017  0.228  1.0
  P  P9  1  0.109  0.483  0.772  1.0
  P  P10  1  0.391  0.983  0.772  1.0
  P  P11  1  0.891  0.517  0.228  1.0
  P  P12  1  0.534  0.302  0.679  1.0
  P  P13  1  0.034  0.198  0.321  1.0
  P  P14  1  0.466  0.698  0.321  1.0
  P  P15  1  0.966  0.802  0.679  1.0
  S  S16  1  0.811  0.845  0.655  1.0
  S  S17  1  0.311  0.655  0.345  1.0
  S  S18  1  0.189  0.155  0.345  1.0
  S  S19  1  0.689  0.345  0.655  1.0
  S  S20  1  0.711  0.890  0.124  1.0
  S  S21  1  0.211  0.610  0.876  1.0
  S  S22  1  0.289  0.110  0.876  1.0
  S  S23  1  0.789  0.390  0.124  1.0
  S  S24  1  0.969  0.070  0.174  1.0
  S  S25  1  0.469  0.430  0.826  1.0
  S  S26  1  0.031  0.930  0.826  1.0
  S  S27  1  0.531  0.570  0.174  1.0
  S  S28  1  0.825  0.569  0.410  1.0
  S  S29  1  0.325  0.931  0.590  1.0
  S  S30  1  0.175  0.431  0.590  1.0
  S  S31  1  0.675  0.069  0.410  1.0
  S  S32  1  0.050  0.816  0.503  1.0
  S  S33  1  0.550  0.684  0.497  1.0
  S  S34  1  0.950  0.184  0.497  1.0
  S  S35  1  0.450  0.316  0.503  1.0
  S  S36  1  0.457  0.917  0.249  1.0
  S  S37  1  0.957  0.583  0.751  1.0
  S  S38  1  0.543  0.083  0.751  1.0
  S  S39  1  0.043  0.417  0.249  1.0
  S  S40  1  0.942  0.703  0.134  1.0
  S  S41  1  0.442  0.797  0.866  1.0
  S  S42  1  0.058  0.297  0.866  1.0
  S  S43  1  0.558  0.203  0.134  1.0
[/CIF]
.
The compound described by KBiP2S7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one S(6), one S(7), two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms. Bi(1) is bonded to one S(1), one S(2), one S(3), one S(5), one S(7), and two equivalent S(4) atoms to form distorted BiS7 pentagonal bipyramids that share corners with two equivalent Bi(1)S7 pentagonal bipyramids,  a cornercorner with one P(2)S4 tetrahedra,  an edgeedge with one P(2)S4 tetrahedra, and edges with two equivalent P(1)S4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one S(2), one S(4), one S(6), and one S(7) atom to form PS4 tetrahedra that share  a cornercorner with one P(2)S4 tetrahedra and edges with two equivalent Bi(1)S7 pentagonal bipyramids. In the second P site, P(2) is bonded to one S(1), one S(3), one S(5), and one S(6) atom to form PS4 tetrahedra that share  a cornercorner with one Bi(1)S7 pentagonal bipyramid,  a cornercorner with one P(1)S4 tetrahedra, and  an edgeedge with one Bi(1)S7 pentagonal bipyramid. There are seven inequivalent S sites. In the first S site, S(5) is bonded in an L-shaped geometry to one Bi(1) and one P(2) atom. In the second S site, S(6) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(1), and one P(2) atom. In the third S site, S(7) is bonded in a distorted T-shaped geometry to one K(1), one Bi(1), and one P(1) atom. In the fourth S site, S(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), one Bi(1), and one P(2) atom. In the fifth S site, S(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Bi(1), and one P(1) atom. In the sixth S site, S(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Bi(1), and one P(2) atom. In the seventh S site, S(4) is bonded in a 3-coordinate geometry to two equivalent Bi(1) and one P(1) atom. is represented by the CIF file [CIF]
data_KBiP2S7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.744
_cell_length_b   9.238
_cell_length_c   9.777
_cell_angle_alpha   89.579
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1151.083
_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  0.688  0.626  0.888  1.0
  K  K1  1  0.188  0.874  0.112  1.0
  K  K2  1  0.312  0.374  0.112  1.0
  K  K3  1  0.812  0.126  0.888  1.0
  Bi  Bi4  1  0.637  0.374  0.348  1.0
  Bi  Bi5  1  0.137  0.126  0.652  1.0
  Bi  Bi6  1  0.363  0.626  0.652  1.0
  Bi  Bi7  1  0.863  0.874  0.348  1.0
  P  P8  1  0.609  0.017  0.228  1.0
  P  P9  1  0.109  0.483  0.772  1.0
  P  P10  1  0.391  0.983  0.772  1.0
  P  P11  1  0.891  0.517  0.228  1.0
  P  P12  1  0.534  0.302  0.679  1.0
  P  P13  1  0.034  0.198  0.321  1.0
  P  P14  1  0.466  0.698  0.321  1.0
  P  P15  1  0.966  0.802  0.679  1.0
  S  S16  1  0.811  0.845  0.655  1.0
  S  S17  1  0.311  0.655  0.345  1.0
  S  S18  1  0.189  0.155  0.345  1.0
  S  S19  1  0.689  0.345  0.655  1.0
  S  S20  1  0.711  0.890  0.124  1.0
  S  S21  1  0.211  0.610  0.876  1.0
  S  S22  1  0.289  0.110  0.876  1.0
  S  S23  1  0.789  0.390  0.124  1.0
  S  S24  1  0.969  0.070  0.174  1.0
  S  S25  1  0.469  0.430  0.826  1.0
  S  S26  1  0.031  0.930  0.826  1.0
  S  S27  1  0.531  0.570  0.174  1.0
  S  S28  1  0.825  0.569  0.410  1.0
  S  S29  1  0.325  0.931  0.590  1.0
  S  S30  1  0.175  0.431  0.590  1.0
  S  S31  1  0.675  0.069  0.410  1.0
  S  S32  1  0.050  0.816  0.503  1.0
  S  S33  1  0.550  0.684  0.497  1.0
  S  S34  1  0.950  0.184  0.497  1.0
  S  S35  1  0.450  0.316  0.503  1.0
  S  S36  1  0.457  0.917  0.249  1.0
  S  S37  1  0.957  0.583  0.751  1.0
  S  S38  1  0.543  0.083  0.751  1.0
  S  S39  1  0.043  0.417  0.249  1.0
  S  S40  1  0.942  0.703  0.134  1.0
  S  S41  1  0.442  0.797  0.866  1.0
  S  S42  1  0.058  0.297  0.866  1.0
  S  S43  1  0.558  0.203  0.134  1.0
[/CIF]
.