The material described by K3Bi5Cu2S10 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(1), two equivalent S(4), and two equivalent S(5) atoms. In the second K site, K(2) is bonded to two equivalent S(5) and four equivalent S(3) atoms to form distorted KS6 octahedra that share corners with four equivalent Bi(1)S6 octahedra, corners with two equivalent Cu(1)S4 tetrahedra, edges with two equivalent K(2)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, and edges with four equivalent Bi(2)S6 octahedra. The corner-sharing octahedral tilt angles are 13°. Cu(1) is bonded to one S(4), one S(5), and two equivalent S(1) atoms to form distorted CuS4 tetrahedra that share  a cornercorner with one K(2)S6 octahedra,  a cornercorner with one Bi(3)S6 octahedra, corners with two equivalent Cu(1)S4 tetrahedra, edges with two equivalent Bi(1)S6 octahedra, and edges with two equivalent Bi(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 5-14°. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms to form BiS6 octahedra that share  a cornercorner with one Bi(2)S6 octahedra, corners with two equivalent K(2)S6 octahedra,  an edgeedge with one K(2)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, edges with two equivalent Bi(2)S6 octahedra, edges with two equivalent Bi(3)S6 octahedra, and edges with two equivalent Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles range from 13-44°. In the second Bi site, Bi(2) is bonded to one S(1), one S(3), two equivalent S(2), and two equivalent S(5) atoms to form distorted BiS6 octahedra that share  a cornercorner with one Bi(1)S6 octahedra, corners with two equivalent Bi(3)S6 octahedra,  an edgeedge with one Bi(3)S6 octahedra, edges with two equivalent K(2)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, edges with two equivalent Bi(2)S6 octahedra, and edges with two equivalent Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles range from 5-44°. In the third Bi site, Bi(3) is bonded to two equivalent S(4) and four equivalent S(2) atoms to form BiS6 octahedra that share corners with four equivalent Bi(2)S6 octahedra, corners with two equivalent Cu(1)S4 tetrahedra, edges with two equivalent Bi(2)S6 octahedra, edges with two equivalent Bi(3)S6 octahedra, and edges with four equivalent Bi(1)S6 octahedra. The corner-sharing octahedral tilt angles are 5°. There are five inequivalent S sites. In the first S site, S(1) is bonded in a 6-coordinate geometry to two equivalent K(1), two equivalent Cu(1), one Bi(1), and one Bi(2) atom. In the second S site, S(2) is bonded to one K(1), one Bi(1), two equivalent Bi(2), and two equivalent Bi(3) atoms to form SKBi5 octahedra that share corners with two equivalent S(2)KBi5 octahedra, corners with four equivalent S(5)K3CuBi2 octahedra,  an edgeedge with one S(5)K3CuBi2 octahedra, edges with three equivalent S(2)KBi5 octahedra, edges with four equivalent S(4)K2CuBi3 octahedra, and edges with two equivalent S(3)K2Bi3 square pyramids. The corner-sharing octahedral tilt angles range from 0-43°. In the third S site, S(3) is bonded to two equivalent K(2), one Bi(2), and two equivalent Bi(1) atoms to form SK2Bi3 square pyramids that share corners with two equivalent S(4)K2CuBi3 octahedra, corners with two equivalent S(5)K3CuBi2 octahedra, corners with two equivalent S(3)K2Bi3 square pyramids,  an edgeedge with one S(4)K2CuBi3 octahedra, edges with two equivalent S(5)K3CuBi2 octahedra, edges with two equivalent S(2)KBi5 octahedra, and edges with three equivalent S(3)K2Bi3 square pyramids. The corner-sharing octahedral tilt angles range from 7-77°. In the fourth S site, S(4) is bonded to two equivalent K(1), one Cu(1), one Bi(3), and two equivalent Bi(1) atoms to form distorted SK2CuBi3 octahedra that share  a cornercorner with one S(4)K2CuBi3 octahedra, corners with two equivalent S(5)K3CuBi2 octahedra, corners with two equivalent S(3)K2Bi3 square pyramids, edges with two equivalent S(4)K2CuBi3 octahedra, edges with four equivalent S(2)KBi5 octahedra,  an edgeedge with one S(3)K2Bi3 square pyramid, and  a faceface with one S(5)K3CuBi2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the fifth S site, S(5) is bonded to one K(2), two equivalent K(1), one Cu(1), and two equivalent Bi(2) atoms to form distorted SK3CuBi2 octahedra that share  a cornercorner with one S(5)K3CuBi2 octahedra, corners with two equivalent S(4)K2CuBi3 octahedra, corners with four equivalent S(2)KBi5 octahedra, corners with two equivalent S(3)K2Bi3 square pyramids,  an edgeedge with one S(2)KBi5 octahedra, edges with two equivalent S(5)K3CuBi2 octahedra, edges with two equivalent S(3)K2Bi3 square pyramids, and  a faceface with one S(4)K2CuBi3 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. is represented by the CIF file [CIF]
data_K3Cu2(BiS2)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.035
_cell_length_b   14.283
_cell_length_c   17.788
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1025.120
_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  0.500  0.975  0.247  1.0
  K  K1  1  0.500  0.025  0.753  1.0
  K  K2  1  0.000  0.475  0.253  1.0
  K  K3  1  0.000  0.525  0.747  1.0
  K  K4  1  0.500  0.500  0.000  1.0
  K  K5  1  0.000  0.000  0.500  1.0
  Cu  Cu6  1  0.000  0.218  0.247  1.0
  Cu  Cu7  1  0.500  0.718  0.253  1.0
  Cu  Cu8  1  0.500  0.282  0.747  1.0
  Cu  Cu9  1  0.000  0.782  0.753  1.0
  Bi  Bi10  1  0.000  0.720  0.403  1.0
  Bi  Bi11  1  0.500  0.231  0.396  1.0
  Bi  Bi12  1  0.000  0.280  0.597  1.0
  Bi  Bi13  1  0.000  0.269  0.896  1.0
  Bi  Bi14  1  0.500  0.769  0.604  1.0
  Bi  Bi15  1  0.500  0.500  0.500  1.0
  Bi  Bi16  1  0.000  0.731  0.104  1.0
  Bi  Bi17  1  0.500  0.220  0.097  1.0
  Bi  Bi18  1  0.500  0.780  0.903  1.0
  Bi  Bi19  1  0.000  0.000  0.000  1.0
  S  S20  1  0.000  0.800  0.266  1.0
  S  S21  1  0.500  0.123  0.946  1.0
  S  S22  1  0.500  0.300  0.234  1.0
  S  S23  1  0.500  0.877  0.054  1.0
  S  S24  1  0.000  0.662  0.964  1.0
  S  S25  1  0.500  0.406  0.640  1.0
  S  S26  1  0.000  0.200  0.734  1.0
  S  S27  1  0.000  0.338  0.036  1.0
  S  S28  1  0.000  0.906  0.860  1.0
  S  S29  1  0.500  0.162  0.536  1.0
  S  S30  1  0.000  0.117  0.351  1.0
  S  S31  1  0.000  0.883  0.649  1.0
  S  S32  1  0.000  0.377  0.446  1.0
  S  S33  1  0.500  0.838  0.464  1.0
  S  S34  1  0.000  0.094  0.140  1.0
  S  S35  1  0.500  0.617  0.149  1.0
  S  S36  1  0.000  0.623  0.554  1.0
  S  S37  1  0.500  0.700  0.766  1.0
  S  S38  1  0.500  0.383  0.851  1.0
  S  S39  1  0.500  0.594  0.360  1.0
[/CIF]
.
The material described by K3Bi5Cu2S10 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(1), two equivalent S(4), and two equivalent S(5) atoms. In the second K site, K(2) is bonded to two equivalent S(5) and four equivalent S(3) atoms to form distorted KS6 octahedra that share corners with four equivalent Bi(1)S6 octahedra, corners with two equivalent Cu(1)S4 tetrahedra, edges with two equivalent K(2)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, and edges with four equivalent Bi(2)S6 octahedra. The corner-sharing octahedral tilt angles are 13°. Cu(1) is bonded to one S(4), one S(5), and two equivalent S(1) atoms to form distorted CuS4 tetrahedra that share  a cornercorner with one K(2)S6 octahedra,  a cornercorner with one Bi(3)S6 octahedra, corners with two equivalent Cu(1)S4 tetrahedra, edges with two equivalent Bi(1)S6 octahedra, and edges with two equivalent Bi(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 5-14°. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms to form BiS6 octahedra that share  a cornercorner with one Bi(2)S6 octahedra, corners with two equivalent K(2)S6 octahedra,  an edgeedge with one K(2)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, edges with two equivalent Bi(2)S6 octahedra, edges with two equivalent Bi(3)S6 octahedra, and edges with two equivalent Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles range from 13-44°. In the second Bi site, Bi(2) is bonded to one S(1), one S(3), two equivalent S(2), and two equivalent S(5) atoms to form distorted BiS6 octahedra that share  a cornercorner with one Bi(1)S6 octahedra, corners with two equivalent Bi(3)S6 octahedra,  an edgeedge with one Bi(3)S6 octahedra, edges with two equivalent K(2)S6 octahedra, edges with two equivalent Bi(1)S6 octahedra, edges with two equivalent Bi(2)S6 octahedra, and edges with two equivalent Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles range from 5-44°. In the third Bi site, Bi(3) is bonded to two equivalent S(4) and four equivalent S(2) atoms to form BiS6 octahedra that share corners with four equivalent Bi(2)S6 octahedra, corners with two equivalent Cu(1)S4 tetrahedra, edges with two equivalent Bi(2)S6 octahedra, edges with two equivalent Bi(3)S6 octahedra, and edges with four equivalent Bi(1)S6 octahedra. The corner-sharing octahedral tilt angles are 5°. There are five inequivalent S sites. In the first S site, S(1) is bonded in a 6-coordinate geometry to two equivalent K(1), two equivalent Cu(1), one Bi(1), and one Bi(2) atom. In the second S site, S(2) is bonded to one K(1), one Bi(1), two equivalent Bi(2), and two equivalent Bi(3) atoms to form SKBi5 octahedra that share corners with two equivalent S(2)KBi5 octahedra, corners with four equivalent S(5)K3CuBi2 octahedra,  an edgeedge with one S(5)K3CuBi2 octahedra, edges with three equivalent S(2)KBi5 octahedra, edges with four equivalent S(4)K2CuBi3 octahedra, and edges with two equivalent S(3)K2Bi3 square pyramids. The corner-sharing octahedral tilt angles range from 0-43°. In the third S site, S(3) is bonded to two equivalent K(2), one Bi(2), and two equivalent Bi(1) atoms to form SK2Bi3 square pyramids that share corners with two equivalent S(4)K2CuBi3 octahedra, corners with two equivalent S(5)K3CuBi2 octahedra, corners with two equivalent S(3)K2Bi3 square pyramids,  an edgeedge with one S(4)K2CuBi3 octahedra, edges with two equivalent S(5)K3CuBi2 octahedra, edges with two equivalent S(2)KBi5 octahedra, and edges with three equivalent S(3)K2Bi3 square pyramids. The corner-sharing octahedral tilt angles range from 7-77°. In the fourth S site, S(4) is bonded to two equivalent K(1), one Cu(1), one Bi(3), and two equivalent Bi(1) atoms to form distorted SK2CuBi3 octahedra that share  a cornercorner with one S(4)K2CuBi3 octahedra, corners with two equivalent S(5)K3CuBi2 octahedra, corners with two equivalent S(3)K2Bi3 square pyramids, edges with two equivalent S(4)K2CuBi3 octahedra, edges with four equivalent S(2)KBi5 octahedra,  an edgeedge with one S(3)K2Bi3 square pyramid, and  a faceface with one S(5)K3CuBi2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the fifth S site, S(5) is bonded to one K(2), two equivalent K(1), one Cu(1), and two equivalent Bi(2) atoms to form distorted SK3CuBi2 octahedra that share  a cornercorner with one S(5)K3CuBi2 octahedra, corners with two equivalent S(4)K2CuBi3 octahedra, corners with four equivalent S(2)KBi5 octahedra, corners with two equivalent S(3)K2Bi3 square pyramids,  an edgeedge with one S(2)KBi5 octahedra, edges with two equivalent S(5)K3CuBi2 octahedra, edges with two equivalent S(3)K2Bi3 square pyramids, and  a faceface with one S(4)K2CuBi3 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. is represented by the CIF file [CIF]
data_K3Cu2(BiS2)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.035
_cell_length_b   14.283
_cell_length_c   17.788
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1025.120
_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  0.500  0.975  0.247  1.0
  K  K1  1  0.500  0.025  0.753  1.0
  K  K2  1  0.000  0.475  0.253  1.0
  K  K3  1  0.000  0.525  0.747  1.0
  K  K4  1  0.500  0.500  0.000  1.0
  K  K5  1  0.000  0.000  0.500  1.0
  Cu  Cu6  1  0.000  0.218  0.247  1.0
  Cu  Cu7  1  0.500  0.718  0.253  1.0
  Cu  Cu8  1  0.500  0.282  0.747  1.0
  Cu  Cu9  1  0.000  0.782  0.753  1.0
  Bi  Bi10  1  0.000  0.720  0.403  1.0
  Bi  Bi11  1  0.500  0.231  0.396  1.0
  Bi  Bi12  1  0.000  0.280  0.597  1.0
  Bi  Bi13  1  0.000  0.269  0.896  1.0
  Bi  Bi14  1  0.500  0.769  0.604  1.0
  Bi  Bi15  1  0.500  0.500  0.500  1.0
  Bi  Bi16  1  0.000  0.731  0.104  1.0
  Bi  Bi17  1  0.500  0.220  0.097  1.0
  Bi  Bi18  1  0.500  0.780  0.903  1.0
  Bi  Bi19  1  0.000  0.000  0.000  1.0
  S  S20  1  0.000  0.800  0.266  1.0
  S  S21  1  0.500  0.123  0.946  1.0
  S  S22  1  0.500  0.300  0.234  1.0
  S  S23  1  0.500  0.877  0.054  1.0
  S  S24  1  0.000  0.662  0.964  1.0
  S  S25  1  0.500  0.406  0.640  1.0
  S  S26  1  0.000  0.200  0.734  1.0
  S  S27  1  0.000  0.338  0.036  1.0
  S  S28  1  0.000  0.906  0.860  1.0
  S  S29  1  0.500  0.162  0.536  1.0
  S  S30  1  0.000  0.117  0.351  1.0
  S  S31  1  0.000  0.883  0.649  1.0
  S  S32  1  0.000  0.377  0.446  1.0
  S  S33  1  0.500  0.838  0.464  1.0
  S  S34  1  0.000  0.094  0.140  1.0
  S  S35  1  0.500  0.617  0.149  1.0
  S  S36  1  0.000  0.623  0.554  1.0
  S  S37  1  0.500  0.700  0.766  1.0
  S  S38  1  0.500  0.383  0.851  1.0
  S  S39  1  0.500  0.594  0.360  1.0
[/CIF]
.