The structure described by KBiSiS4 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one S(4), two equivalent S(1), two equivalent S(3), and three equivalent S(2) atoms. Si(1) is bonded in a tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. Bi(1) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(1), two equivalent S(3), and two equivalent S(4) atoms. There are four inequivalent S sites. In the first S site, S(1) is bonded in a distorted single-bond geometry to two equivalent K(1), one Si(1), and two equivalent Bi(1) atoms. In the second S site, S(2) is bonded to three equivalent K(1), one Si(1), and one Bi(1) atom to form a mixture of distorted edge and corner-sharing SK3SiBi trigonal bipyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent K(1), one Si(1), and two equivalent Bi(1) atoms. In the fourth S site, S(4) is bonded in a distorted see-saw-like geometry to one K(1), one Si(1), and two equivalent Bi(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSiBiS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.766
_cell_length_b   6.525
_cell_length_c   17.266
_cell_angle_alpha   72.634
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   727.517
_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  0.250  0.277  0.965  1.0
  K  K1  1  0.750  0.723  0.535  1.0
  K  K2  1  0.750  0.723  0.035  1.0
  K  K3  1  0.250  0.277  0.465  1.0
  Si  Si4  1  0.733  0.209  0.843  1.0
  Si  Si5  1  0.233  0.791  0.657  1.0
  Si  Si6  1  0.267  0.791  0.157  1.0
  Si  Si7  1  0.767  0.209  0.343  1.0
  Bi  Bi8  1  0.804  0.762  0.779  1.0
  Bi  Bi9  1  0.304  0.238  0.721  1.0
  Bi  Bi10  1  0.196  0.238  0.221  1.0
  Bi  Bi11  1  0.696  0.762  0.279  1.0
  S  S12  1  0.498  0.987  0.868  1.0
  S  S13  1  0.998  0.013  0.632  1.0
  S  S14  1  0.502  0.013  0.132  1.0
  S  S15  1  0.002  0.987  0.368  1.0
  S  S16  1  0.749  0.414  0.917  1.0
  S  S17  1  0.249  0.586  0.583  1.0
  S  S18  1  0.251  0.586  0.083  1.0
  S  S19  1  0.751  0.414  0.417  1.0
  S  S20  1  0.991  0.017  0.858  1.0
  S  S21  1  0.491  0.983  0.642  1.0
  S  S22  1  0.009  0.983  0.142  1.0
  S  S23  1  0.509  0.017  0.358  1.0
  S  S24  1  0.686  0.401  0.719  1.0
  S  S25  1  0.186  0.599  0.781  1.0
  S  S26  1  0.314  0.599  0.281  1.0
  S  S27  1  0.814  0.401  0.219  1.0
[/CIF]
.
The structure described by KBiSiS4 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to one S(4), two equivalent S(1), two equivalent S(3), and three equivalent S(2) atoms. Si(1) is bonded in a tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. Bi(1) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(1), two equivalent S(3), and two equivalent S(4) atoms. There are four inequivalent S sites. In the first S site, S(1) is bonded in a distorted single-bond geometry to two equivalent K(1), one Si(1), and two equivalent Bi(1) atoms. In the second S site, S(2) is bonded to three equivalent K(1), one Si(1), and one Bi(1) atom to form a mixture of distorted edge and corner-sharing SK3SiBi trigonal bipyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent K(1), one Si(1), and two equivalent Bi(1) atoms. In the fourth S site, S(4) is bonded in a distorted see-saw-like geometry to one K(1), one Si(1), and two equivalent Bi(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSiBiS4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.766
_cell_length_b   6.525
_cell_length_c   17.266
_cell_angle_alpha   72.634
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   727.517
_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  0.250  0.277  0.965  1.0
  K  K1  1  0.750  0.723  0.535  1.0
  K  K2  1  0.750  0.723  0.035  1.0
  K  K3  1  0.250  0.277  0.465  1.0
  Si  Si4  1  0.733  0.209  0.843  1.0
  Si  Si5  1  0.233  0.791  0.657  1.0
  Si  Si6  1  0.267  0.791  0.157  1.0
  Si  Si7  1  0.767  0.209  0.343  1.0
  Bi  Bi8  1  0.804  0.762  0.779  1.0
  Bi  Bi9  1  0.304  0.238  0.721  1.0
  Bi  Bi10  1  0.196  0.238  0.221  1.0
  Bi  Bi11  1  0.696  0.762  0.279  1.0
  S  S12  1  0.498  0.987  0.868  1.0
  S  S13  1  0.998  0.013  0.632  1.0
  S  S14  1  0.502  0.013  0.132  1.0
  S  S15  1  0.002  0.987  0.368  1.0
  S  S16  1  0.749  0.414  0.917  1.0
  S  S17  1  0.249  0.586  0.583  1.0
  S  S18  1  0.251  0.586  0.083  1.0
  S  S19  1  0.751  0.414  0.417  1.0
  S  S20  1  0.991  0.017  0.858  1.0
  S  S21  1  0.491  0.983  0.642  1.0
  S  S22  1  0.009  0.983  0.142  1.0
  S  S23  1  0.509  0.017  0.358  1.0
  S  S24  1  0.686  0.401  0.719  1.0
  S  S25  1  0.186  0.599  0.781  1.0
  S  S26  1  0.314  0.599  0.281  1.0
  S  S27  1  0.814  0.401  0.219  1.0
[/CIF]
.