The compound described by FePb4Sb6S14 crystallizes in the monoclinic P2_1/c space group. Fe(1) is bonded to two equivalent S(5) and four equivalent S(6) atoms to form FeS6 octahedra that share corners with two equivalent Pb(2)S6 octahedra and edges with two equivalent Fe(1)S6 octahedra. The corner-sharing octahedral tilt angles are 36°. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 5-coordinate geometry to one S(2), two equivalent S(6), and two equivalent S(7) atoms. In the second Pb site, Pb(2) is bonded to one S(3), one S(5), two equivalent S(4), and two equivalent S(7) atoms to form distorted PbS6 octahedra that share  a cornercorner with one Fe(1)S6 octahedra, edges with two equivalent Pb(2)S6 octahedra, and edges with two equivalent Sb(2)S5 square pyramids. The corner-sharing octahedral tilt angles are 36°. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 5-coordinate geometry to one S(6), two equivalent S(2), and two equivalent S(5) atoms. In the second Sb site, Sb(2) is bonded to one S(7), two equivalent S(2), and two equivalent S(3) atoms to form distorted SbS5 square pyramids that share edges with two equivalent Pb(2)S6 octahedra and edges with two equivalent Sb(2)S5 square pyramids. In the third Sb site, Sb(3) is bonded in a distorted rectangular see-saw-like geometry to one S(4), two equivalent S(1), and two equivalent S(3) atoms. There are seven inequivalent S sites. In the first S site, S(5) is bonded in a 4-coordinate geometry to one Fe(1), one Pb(2), and two equivalent Sb(1) atoms. In the second S site, S(6) is bonded to two equivalent Fe(1), two equivalent Pb(1), and one Sb(1) atom to form distorted SFe2SbPb2 square pyramids that share corners with two equivalent S(6)Fe2SbPb2 square pyramids, edges with two equivalent S(2)Sb4Pb square pyramids, and edges with three equivalent S(6)Fe2SbPb2 square pyramids. In the third S site, S(7) is bonded in a 5-coordinate geometry to two equivalent Pb(1), two equivalent Pb(2), and one Sb(2) atom. In the fourth S site, S(1) is bonded in a distorted water-like geometry to two equivalent Sb(3) atoms. In the fifth S site, S(2) is bonded to one Pb(1), two equivalent Sb(1), and two equivalent Sb(2) atoms to form distorted SSb4Pb square pyramids that share edges with two equivalent S(6)Fe2SbPb2 square pyramids and edges with two equivalent S(2)Sb4Pb square pyramids. In the sixth S site, S(3) is bonded in a 5-coordinate geometry to one Pb(2), two equivalent Sb(2), and two equivalent Sb(3) atoms. In the seventh S site, S(4) is bonded in a 3-coordinate geometry to two equivalent Pb(2) and one Sb(3) atom. is represented by the CIF file [CIF]
data_FeSb6(Pb2S7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.484
_cell_length_b   4.044
_cell_length_c   15.971
_cell_angle_alpha   87.770
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1257.422
_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
  Fe  Fe0  1  0.000  0.000  0.000  1.0
  Fe  Fe1  1  0.500  0.000  0.500  1.0
  Sb  Sb2  1  0.440  0.593  0.317  1.0
  Sb  Sb3  1  0.446  0.373  0.896  1.0
  Sb  Sb4  1  0.946  0.627  0.604  1.0
  Sb  Sb5  1  0.940  0.407  0.183  1.0
  Sb  Sb6  1  0.060  0.593  0.817  1.0
  Sb  Sb7  1  0.054  0.373  0.396  1.0
  Sb  Sb8  1  0.560  0.407  0.683  1.0
  Sb  Sb9  1  0.554  0.627  0.104  1.0
  Sb  Sb10  1  0.661  0.628  0.872  1.0
  Sb  Sb11  1  0.161  0.372  0.628  1.0
  Sb  Sb12  1  0.339  0.372  0.128  1.0
  Sb  Sb13  1  0.839  0.628  0.372  1.0
  Pb  Pb14  1  0.863  0.037  0.817  1.0
  Pb  Pb15  1  0.363  0.963  0.683  1.0
  Pb  Pb16  1  0.137  0.963  0.183  1.0
  Pb  Pb17  1  0.637  0.037  0.317  1.0
  Pb  Pb18  1  0.758  0.065  0.575  1.0
  Pb  Pb19  1  0.258  0.935  0.925  1.0
  Pb  Pb20  1  0.242  0.935  0.425  1.0
  Pb  Pb21  1  0.742  0.065  0.075  1.0
  S  S22  1  0.799  0.107  0.280  1.0
  S  S23  1  0.507  0.032  0.215  1.0
  S  S24  1  0.007  0.968  0.285  1.0
  S  S25  1  0.493  0.968  0.785  1.0
  S  S26  1  0.993  0.032  0.715  1.0
  S  S27  1  0.896  0.063  0.500  1.0
  S  S28  1  0.396  0.937  0.000  1.0
  S  S29  1  0.104  0.937  0.500  1.0
  S  S30  1  0.604  0.063  1.000  1.0
  S  S31  1  0.730  0.584  0.450  1.0
  S  S32  1  0.601  0.984  0.582  1.0
  S  S33  1  0.101  0.016  0.918  1.0
  S  S34  1  0.399  0.016  0.418  1.0
  S  S35  1  0.899  0.984  0.082  1.0
  S  S36  1  0.956  0.526  0.907  1.0
  S  S37  1  0.456  0.474  0.593  1.0
  S  S38  1  0.044  0.474  0.093  1.0
  S  S39  1  0.544  0.526  0.407  1.0
  S  S40  1  0.838  0.558  0.684  1.0
  S  S41  1  0.338  0.442  0.816  1.0
  S  S42  1  0.162  0.442  0.316  1.0
  S  S43  1  0.662  0.558  0.184  1.0
  S  S44  1  0.701  0.107  0.780  1.0
  S  S45  1  0.201  0.893  0.720  1.0
  S  S46  1  0.299  0.893  0.220  1.0
  S  S47  1  0.270  0.416  0.550  1.0
  S  S48  1  0.770  0.584  0.950  1.0
  S  S49  1  0.230  0.416  0.050  1.0
[/CIF]
.
The compound described by FePb4Sb6S14 crystallizes in the monoclinic P2_1/c space group. Fe(1) is bonded to two equivalent S(5) and four equivalent S(6) atoms to form FeS6 octahedra that share corners with two equivalent Pb(2)S6 octahedra and edges with two equivalent Fe(1)S6 octahedra. The corner-sharing octahedral tilt angles are 36°. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 5-coordinate geometry to one S(2), two equivalent S(6), and two equivalent S(7) atoms. In the second Pb site, Pb(2) is bonded to one S(3), one S(5), two equivalent S(4), and two equivalent S(7) atoms to form distorted PbS6 octahedra that share  a cornercorner with one Fe(1)S6 octahedra, edges with two equivalent Pb(2)S6 octahedra, and edges with two equivalent Sb(2)S5 square pyramids. The corner-sharing octahedral tilt angles are 36°. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 5-coordinate geometry to one S(6), two equivalent S(2), and two equivalent S(5) atoms. In the second Sb site, Sb(2) is bonded to one S(7), two equivalent S(2), and two equivalent S(3) atoms to form distorted SbS5 square pyramids that share edges with two equivalent Pb(2)S6 octahedra and edges with two equivalent Sb(2)S5 square pyramids. In the third Sb site, Sb(3) is bonded in a distorted rectangular see-saw-like geometry to one S(4), two equivalent S(1), and two equivalent S(3) atoms. There are seven inequivalent S sites. In the first S site, S(5) is bonded in a 4-coordinate geometry to one Fe(1), one Pb(2), and two equivalent Sb(1) atoms. In the second S site, S(6) is bonded to two equivalent Fe(1), two equivalent Pb(1), and one Sb(1) atom to form distorted SFe2SbPb2 square pyramids that share corners with two equivalent S(6)Fe2SbPb2 square pyramids, edges with two equivalent S(2)Sb4Pb square pyramids, and edges with three equivalent S(6)Fe2SbPb2 square pyramids. In the third S site, S(7) is bonded in a 5-coordinate geometry to two equivalent Pb(1), two equivalent Pb(2), and one Sb(2) atom. In the fourth S site, S(1) is bonded in a distorted water-like geometry to two equivalent Sb(3) atoms. In the fifth S site, S(2) is bonded to one Pb(1), two equivalent Sb(1), and two equivalent Sb(2) atoms to form distorted SSb4Pb square pyramids that share edges with two equivalent S(6)Fe2SbPb2 square pyramids and edges with two equivalent S(2)Sb4Pb square pyramids. In the sixth S site, S(3) is bonded in a 5-coordinate geometry to one Pb(2), two equivalent Sb(2), and two equivalent Sb(3) atoms. In the seventh S site, S(4) is bonded in a 3-coordinate geometry to two equivalent Pb(2) and one Sb(3) atom. is represented by the CIF file [CIF]
data_FeSb6(Pb2S7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.484
_cell_length_b   4.044
_cell_length_c   15.971
_cell_angle_alpha   87.770
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1257.422
_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
  Fe  Fe0  1  0.000  0.000  0.000  1.0
  Fe  Fe1  1  0.500  0.000  0.500  1.0
  Sb  Sb2  1  0.440  0.593  0.317  1.0
  Sb  Sb3  1  0.446  0.373  0.896  1.0
  Sb  Sb4  1  0.946  0.627  0.604  1.0
  Sb  Sb5  1  0.940  0.407  0.183  1.0
  Sb  Sb6  1  0.060  0.593  0.817  1.0
  Sb  Sb7  1  0.054  0.373  0.396  1.0
  Sb  Sb8  1  0.560  0.407  0.683  1.0
  Sb  Sb9  1  0.554  0.627  0.104  1.0
  Sb  Sb10  1  0.661  0.628  0.872  1.0
  Sb  Sb11  1  0.161  0.372  0.628  1.0
  Sb  Sb12  1  0.339  0.372  0.128  1.0
  Sb  Sb13  1  0.839  0.628  0.372  1.0
  Pb  Pb14  1  0.863  0.037  0.817  1.0
  Pb  Pb15  1  0.363  0.963  0.683  1.0
  Pb  Pb16  1  0.137  0.963  0.183  1.0
  Pb  Pb17  1  0.637  0.037  0.317  1.0
  Pb  Pb18  1  0.758  0.065  0.575  1.0
  Pb  Pb19  1  0.258  0.935  0.925  1.0
  Pb  Pb20  1  0.242  0.935  0.425  1.0
  Pb  Pb21  1  0.742  0.065  0.075  1.0
  S  S22  1  0.799  0.107  0.280  1.0
  S  S23  1  0.507  0.032  0.215  1.0
  S  S24  1  0.007  0.968  0.285  1.0
  S  S25  1  0.493  0.968  0.785  1.0
  S  S26  1  0.993  0.032  0.715  1.0
  S  S27  1  0.896  0.063  0.500  1.0
  S  S28  1  0.396  0.937  0.000  1.0
  S  S29  1  0.104  0.937  0.500  1.0
  S  S30  1  0.604  0.063  1.000  1.0
  S  S31  1  0.730  0.584  0.450  1.0
  S  S32  1  0.601  0.984  0.582  1.0
  S  S33  1  0.101  0.016  0.918  1.0
  S  S34  1  0.399  0.016  0.418  1.0
  S  S35  1  0.899  0.984  0.082  1.0
  S  S36  1  0.956  0.526  0.907  1.0
  S  S37  1  0.456  0.474  0.593  1.0
  S  S38  1  0.044  0.474  0.093  1.0
  S  S39  1  0.544  0.526  0.407  1.0
  S  S40  1  0.838  0.558  0.684  1.0
  S  S41  1  0.338  0.442  0.816  1.0
  S  S42  1  0.162  0.442  0.316  1.0
  S  S43  1  0.662  0.558  0.184  1.0
  S  S44  1  0.701  0.107  0.780  1.0
  S  S45  1  0.201  0.893  0.720  1.0
  S  S46  1  0.299  0.893  0.220  1.0
  S  S47  1  0.270  0.416  0.550  1.0
  S  S48  1  0.770  0.584  0.950  1.0
  S  S49  1  0.230  0.416  0.050  1.0
[/CIF]
.