The material structure described by Ag3Bi8S13 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to one S(5), one S(6), two equivalent S(1), and two equivalent S(4) atoms to form AgS6 octahedra that share  a cornercorner with one Ag(1)S6 octahedra, corners with two equivalent Bi(1)S6 octahedra, corners with two equivalent Bi(2)S6 octahedra, edges with two equivalent Ag(1)S6 octahedra, edges with two equivalent Bi(3)S6 octahedra, edges with three equivalent Bi(1)S6 octahedra, and edges with five equivalent Bi(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the second Ag site, Ag(2) is bonded to two equivalent S(7) and four equivalent S(2) atoms to form AgS6 octahedra that share corners with two equivalent Bi(3)S6 octahedra, corners with four equivalent Bi(4)S5 square pyramids, edges with two equivalent Ag(2)S6 octahedra, and edges with six equivalent Bi(4)S5 square pyramids. The corner-sharing octahedral tilt angles are 53°. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one S(1), one S(3), two equivalent S(4), and two equivalent S(5) atoms to form BiS6 octahedra that share  a cornercorner with one Bi(2)S6 octahedra, corners with two equivalent Ag(1)S6 octahedra, corners with two equivalent Bi(3)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, edges with two equivalent Bi(2)S6 octahedra, edges with three equivalent Ag(1)S6 octahedra, and edges with three equivalent Bi(3)S6 octahedra. The corner-sharing octahedral tilt angles range from 2-9°. In the second Bi site, Bi(2) is bonded to one S(4), two equivalent S(6), and three equivalent S(1) atoms to form BiS6 octahedra that share  a cornercorner with one Bi(1)S6 octahedra,  a cornercorner with one Bi(3)S6 octahedra, corners with two equivalent Ag(1)S6 octahedra, corners with two equivalent Bi(2)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, edges with five equivalent Ag(1)S6 octahedra, and edges with five equivalent Bi(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the third Bi site, Bi(3) is bonded to one S(4), one S(7), two equivalent S(3), and two equivalent S(5) atoms to form BiS6 octahedra that share  a cornercorner with one Ag(2)S6 octahedra,  a cornercorner with one Bi(2)S6 octahedra, corners with two equivalent Bi(1)S6 octahedra, corners with two equivalent Bi(4)S5 square pyramids, edges with two equivalent Ag(1)S6 octahedra, edges with two equivalent Bi(3)S6 octahedra, and edges with three equivalent Bi(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 1-53°. In the fourth Bi site, Bi(4) is bonded to two equivalent S(7) and three equivalent S(2) atoms to form BiS5 square pyramids that share corners with two equivalent Ag(2)S6 octahedra, corners with two equivalent Bi(3)S6 octahedra, edges with three equivalent Ag(2)S6 octahedra, and edges with four equivalent Bi(4)S5 square pyramids. The corner-sharing octahedral tilt angles range from 13-64°. There are seven inequivalent S sites. In the first S site, S(6) is bonded to two equivalent Ag(1) and four equivalent Bi(2) atoms to form SAg2Bi4 octahedra that share corners with four equivalent S(1)Ag2Bi4 octahedra, corners with two equivalent S(5)AgBi4 square pyramids, edges with two equivalent S(6)Ag2Bi4 octahedra, edges with four equivalent S(4)Ag2Bi4 octahedra, and edges with six equivalent S(1)Ag2Bi4 octahedra. The corner-sharing octahedral tilt angles are 3°. In the second S site, S(7) is bonded to one Ag(2), one Bi(3), and two equivalent Bi(4) atoms to form distorted SAgBi3 tetrahedra that share  a cornercorner with one S(4)Ag2Bi4 octahedra, corners with two equivalent S(5)AgBi4 square pyramids, corners with four equivalent S(2)Ag2Bi3 square pyramids, corners with three equivalent S(7)AgBi3 tetrahedra, and edges with three equivalent S(2)Ag2Bi3 square pyramids. The corner-sharing octahedra are not tilted. In the third S site, S(1) is bonded to two equivalent Ag(1), one Bi(1), and three equivalent Bi(2) atoms to form SAg2Bi4 octahedra that share corners with two equivalent S(6)Ag2Bi4 octahedra, corners with three equivalent S(4)Ag2Bi4 octahedra, edges with three equivalent S(4)Ag2Bi4 octahedra, edges with three equivalent S(6)Ag2Bi4 octahedra, edges with four equivalent S(1)Ag2Bi4 octahedra, and edges with two equivalent S(5)AgBi4 square pyramids. The corner-sharing octahedral tilt angles range from 1-6°. In the fourth S site, S(2) is bonded to two equivalent Ag(2) and three equivalent Bi(4) atoms to form SAg2Bi3 square pyramids that share corners with two equivalent S(2)Ag2Bi3 square pyramids, corners with four equivalent S(7)AgBi3 tetrahedra, edges with five equivalent S(2)Ag2Bi3 square pyramids, and edges with three equivalent S(7)AgBi3 tetrahedra. In the fifth S site, S(3) is bonded in a distorted T-shaped geometry to one Bi(1) and two equivalent Bi(3) atoms. In the sixth S site, S(4) is bonded to two equivalent Ag(1), one Bi(2), one Bi(3), and two equivalent Bi(1) atoms to form SAg2Bi4 octahedra that share corners with three equivalent S(1)Ag2Bi4 octahedra, corners with two equivalent S(5)AgBi4 square pyramids,  a cornercorner with one S(7)AgBi3 tetrahedra, edges with two equivalent S(4)Ag2Bi4 octahedra, edges with two equivalent S(6)Ag2Bi4 octahedra, edges with three equivalent S(1)Ag2Bi4 octahedra, and edges with three equivalent S(5)AgBi4 square pyramids. The corner-sharing octahedral tilt angles range from 1-6°. In the seventh S site, S(5) is bonded to one Ag(1), two equivalent Bi(1), and two equivalent Bi(3) atoms to form SAgBi4 square pyramids that share  a cornercorner with one S(6)Ag2Bi4 octahedra, corners with two equivalent S(4)Ag2Bi4 octahedra, corners with two equivalent S(7)AgBi3 tetrahedra, edges with two equivalent S(1)Ag2Bi4 octahedra, edges with three equivalent S(4)Ag2Bi4 octahedra, and edges with two equivalent S(5)AgBi4 square pyramids. The corner-sharing octahedral tilt angles range from 1-7°. is represented by the CIF card [CIF]
data_Ag3Bi8S13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.922
_cell_length_b   6.922
_cell_length_c   21.844
_cell_angle_alpha   86.821
_cell_angle_beta   86.821
_cell_angle_gamma   35.071
_symmetry_Int_Tables_number   1
_cell_volume   600.381
_cell_formula_units_Z   1
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
  Ag  Ag0  1  0.418  0.418  0.375  1.0
  Ag  Ag1  1  0.582  0.582  0.625  1.0
  Ag  Ag2  1  0.000  0.000  0.000  1.0
  Bi  Bi3  1  0.699  0.699  0.296  1.0
  Bi  Bi4  1  0.301  0.301  0.704  1.0
  Bi  Bi5  1  0.859  0.859  0.542  1.0
  Bi  Bi6  1  0.141  0.141  0.458  1.0
  Bi  Bi7  1  0.977  0.977  0.214  1.0
  Bi  Bi8  1  0.023  0.023  0.786  1.0
  Bi  Bi9  1  0.260  0.260  0.081  1.0
  Bi  Bi10  1  0.740  0.740  0.919  1.0
  S  S11  1  0.777  0.777  0.423  1.0
  S  S12  1  0.223  0.223  0.577  1.0
  S  S13  1  0.645  0.645  0.028  1.0
  S  S14  1  0.355  0.355  0.972  1.0
  S  S15  1  0.615  0.615  0.186  1.0
  S  S16  1  0.385  0.385  0.814  1.0
  S  S17  1  0.936  0.936  0.658  1.0
  S  S18  1  0.064  0.064  0.342  1.0
  S  S19  1  0.341  0.341  0.265  1.0
  S  S20  1  0.659  0.659  0.735  1.0
  S  S21  1  0.500  0.500  0.500  1.0
  S  S22  1  0.902  0.902  0.103  1.0
  S  S23  1  0.098  0.098  0.897  1.0
[/CIF]
.
The material structure described by Ag3Bi8S13 crystallizes in the monoclinic C2/m space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to one S(5), one S(6), two equivalent S(1), and two equivalent S(4) atoms to form AgS6 octahedra that share  a cornercorner with one Ag(1)S6 octahedra, corners with two equivalent Bi(1)S6 octahedra, corners with two equivalent Bi(2)S6 octahedra, edges with two equivalent Ag(1)S6 octahedra, edges with two equivalent Bi(3)S6 octahedra, edges with three equivalent Bi(1)S6 octahedra, and edges with five equivalent Bi(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-6°. In the second Ag site, Ag(2) is bonded to two equivalent S(7) and four equivalent S(2) atoms to form AgS6 octahedra that share corners with two equivalent Bi(3)S6 octahedra, corners with four equivalent Bi(4)S5 square pyramids, edges with two equivalent Ag(2)S6 octahedra, and edges with six equivalent Bi(4)S5 square pyramids. The corner-sharing octahedral tilt angles are 53°. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one S(1), one S(3), two equivalent S(4), and two equivalent S(5) atoms to form BiS6 octahedra that share  a cornercorner with one Bi(2)S6 octahedra, corners with two equivalent Ag(1)S6 octahedra, corners with two equivalent Bi(3)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, edges with two equivalent Bi(2)S6 octahedra, edges with three equivalent Ag(1)S6 octahedra, and edges with three equivalent Bi(3)S6 octahedra. The corner-sharing octahedral tilt angles range from 2-9°. In the second Bi site, Bi(2) is bonded to one S(4), two equivalent S(6), and three equivalent S(1) atoms to form BiS6 octahedra that share  a cornercorner with one Bi(1)S6 octahedra,  a cornercorner with one Bi(3)S6 octahedra, corners with two equivalent Ag(1)S6 octahedra, corners with two equivalent Bi(2)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, edges with five equivalent Ag(1)S6 octahedra, and edges with five equivalent Bi(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the third Bi site, Bi(3) is bonded to one S(4), one S(7), two equivalent S(3), and two equivalent S(5) atoms to form BiS6 octahedra that share  a cornercorner with one Ag(2)S6 octahedra,  a cornercorner with one Bi(2)S6 octahedra, corners with two equivalent Bi(1)S6 octahedra, corners with two equivalent Bi(4)S5 square pyramids, edges with two equivalent Ag(1)S6 octahedra, edges with two equivalent Bi(3)S6 octahedra, and edges with three equivalent Bi(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 1-53°. In the fourth Bi site, Bi(4) is bonded to two equivalent S(7) and three equivalent S(2) atoms to form BiS5 square pyramids that share corners with two equivalent Ag(2)S6 octahedra, corners with two equivalent Bi(3)S6 octahedra, edges with three equivalent Ag(2)S6 octahedra, and edges with four equivalent Bi(4)S5 square pyramids. The corner-sharing octahedral tilt angles range from 13-64°. There are seven inequivalent S sites. In the first S site, S(6) is bonded to two equivalent Ag(1) and four equivalent Bi(2) atoms to form SAg2Bi4 octahedra that share corners with four equivalent S(1)Ag2Bi4 octahedra, corners with two equivalent S(5)AgBi4 square pyramids, edges with two equivalent S(6)Ag2Bi4 octahedra, edges with four equivalent S(4)Ag2Bi4 octahedra, and edges with six equivalent S(1)Ag2Bi4 octahedra. The corner-sharing octahedral tilt angles are 3°. In the second S site, S(7) is bonded to one Ag(2), one Bi(3), and two equivalent Bi(4) atoms to form distorted SAgBi3 tetrahedra that share  a cornercorner with one S(4)Ag2Bi4 octahedra, corners with two equivalent S(5)AgBi4 square pyramids, corners with four equivalent S(2)Ag2Bi3 square pyramids, corners with three equivalent S(7)AgBi3 tetrahedra, and edges with three equivalent S(2)Ag2Bi3 square pyramids. The corner-sharing octahedra are not tilted. In the third S site, S(1) is bonded to two equivalent Ag(1), one Bi(1), and three equivalent Bi(2) atoms to form SAg2Bi4 octahedra that share corners with two equivalent S(6)Ag2Bi4 octahedra, corners with three equivalent S(4)Ag2Bi4 octahedra, edges with three equivalent S(4)Ag2Bi4 octahedra, edges with three equivalent S(6)Ag2Bi4 octahedra, edges with four equivalent S(1)Ag2Bi4 octahedra, and edges with two equivalent S(5)AgBi4 square pyramids. The corner-sharing octahedral tilt angles range from 1-6°. In the fourth S site, S(2) is bonded to two equivalent Ag(2) and three equivalent Bi(4) atoms to form SAg2Bi3 square pyramids that share corners with two equivalent S(2)Ag2Bi3 square pyramids, corners with four equivalent S(7)AgBi3 tetrahedra, edges with five equivalent S(2)Ag2Bi3 square pyramids, and edges with three equivalent S(7)AgBi3 tetrahedra. In the fifth S site, S(3) is bonded in a distorted T-shaped geometry to one Bi(1) and two equivalent Bi(3) atoms. In the sixth S site, S(4) is bonded to two equivalent Ag(1), one Bi(2), one Bi(3), and two equivalent Bi(1) atoms to form SAg2Bi4 octahedra that share corners with three equivalent S(1)Ag2Bi4 octahedra, corners with two equivalent S(5)AgBi4 square pyramids,  a cornercorner with one S(7)AgBi3 tetrahedra, edges with two equivalent S(4)Ag2Bi4 octahedra, edges with two equivalent S(6)Ag2Bi4 octahedra, edges with three equivalent S(1)Ag2Bi4 octahedra, and edges with three equivalent S(5)AgBi4 square pyramids. The corner-sharing octahedral tilt angles range from 1-6°. In the seventh S site, S(5) is bonded to one Ag(1), two equivalent Bi(1), and two equivalent Bi(3) atoms to form SAgBi4 square pyramids that share  a cornercorner with one S(6)Ag2Bi4 octahedra, corners with two equivalent S(4)Ag2Bi4 octahedra, corners with two equivalent S(7)AgBi3 tetrahedra, edges with two equivalent S(1)Ag2Bi4 octahedra, edges with three equivalent S(4)Ag2Bi4 octahedra, and edges with two equivalent S(5)AgBi4 square pyramids. The corner-sharing octahedral tilt angles range from 1-7°. is represented by the CIF card [CIF]
data_Ag3Bi8S13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.922
_cell_length_b   6.922
_cell_length_c   21.844
_cell_angle_alpha   86.821
_cell_angle_beta   86.821
_cell_angle_gamma   35.071
_symmetry_Int_Tables_number   1
_cell_volume   600.381
_cell_formula_units_Z   1
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
  Ag  Ag0  1  0.418  0.418  0.375  1.0
  Ag  Ag1  1  0.582  0.582  0.625  1.0
  Ag  Ag2  1  0.000  0.000  0.000  1.0
  Bi  Bi3  1  0.699  0.699  0.296  1.0
  Bi  Bi4  1  0.301  0.301  0.704  1.0
  Bi  Bi5  1  0.859  0.859  0.542  1.0
  Bi  Bi6  1  0.141  0.141  0.458  1.0
  Bi  Bi7  1  0.977  0.977  0.214  1.0
  Bi  Bi8  1  0.023  0.023  0.786  1.0
  Bi  Bi9  1  0.260  0.260  0.081  1.0
  Bi  Bi10  1  0.740  0.740  0.919  1.0
  S  S11  1  0.777  0.777  0.423  1.0
  S  S12  1  0.223  0.223  0.577  1.0
  S  S13  1  0.645  0.645  0.028  1.0
  S  S14  1  0.355  0.355  0.972  1.0
  S  S15  1  0.615  0.615  0.186  1.0
  S  S16  1  0.385  0.385  0.814  1.0
  S  S17  1  0.936  0.936  0.658  1.0
  S  S18  1  0.064  0.064  0.342  1.0
  S  S19  1  0.341  0.341  0.265  1.0
  S  S20  1  0.659  0.659  0.735  1.0
  S  S21  1  0.500  0.500  0.500  1.0
  S  S22  1  0.902  0.902  0.103  1.0
  S  S23  1  0.098  0.098  0.897  1.0
[/CIF]
.