The crystal structure described by AgSb(Pb7Te8)2 is alpha Po-derived structured and crystallizes in the tetragonal I4/mmm space group. Ag(1) is bonded to two equivalent Te(4) and four equivalent Te(3) atoms to form AgTe6 octahedra that share corners with two equivalent Pb(4)Te6 octahedra, corners with four equivalent Sb(1)Te6 octahedra, edges with four equivalent Pb(2)Te6 octahedra, and edges with eight equivalent Pb(3)Te6 octahedra. The corner-sharing octahedra are not tilted. There are seven inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form a mixture of corner and edge-sharing PbTe6 octahedra. The corner-sharing octahedra are not tilted. In the second Pb site, Pb(2) is bonded to two equivalent Te(1) and four equivalent Te(3) atoms to form PbTe6 octahedra that share corners with two Pb(1,1)Te6 octahedra; corners with four equivalent Pb(2)Te6 octahedra; edges with two equivalent Ag(1)Te6 octahedra; edges with two equivalent Sb(1)Te6 octahedra; and edges with eight equivalent Pb(3)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third Pb site, Pb(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form a mixture of corner and edge-sharing PbTe6 octahedra. The corner-sharing octahedra are not tilted. In the fourth Pb site, Pb(3) is bonded to one Te(2), one Te(3), one Te(4), one Te(5), and two equivalent Te(1) atoms to form PbTe6 octahedra that share corners with six equivalent Pb(3)Te6 octahedra;  an edgeedge with one Ag(1)Te6 octahedra;  an edgeedge with one Sb(1)Te6 octahedra; edges with two Pb(1,1)Te6 octahedra; edges with two equivalent Pb(2)Te6 octahedra; edges with two equivalent Pb(4)Te6 octahedra; and edges with four equivalent Pb(3)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the fifth Pb site, Pb(4) is bonded to one Te(4), one Te(5), and four equivalent Te(2) atoms to form PbTe6 octahedra that share  a cornercorner with one Ag(1)Te6 octahedra;  a cornercorner with one Sb(1)Te6 octahedra; corners with four equivalent Pb(4)Te6 octahedra; edges with four Pb(1,1)Te6 octahedra; and edges with eight equivalent Pb(3)Te6 octahedra. The corner-sharing octahedra are not tilted. In the sixth Pb site, Pb(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form a mixture of corner and edge-sharing PbTe6 octahedra. The corner-sharing octahedra are not tilted. In the seventh Pb site, Pb(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form a mixture of corner and edge-sharing PbTe6 octahedra. The corner-sharing octahedra are not tilted. Sb(1) is bonded to two equivalent Te(5) and four equivalent Te(3) atoms to form SbTe6 octahedra that share corners with two equivalent Pb(4)Te6 octahedra, corners with four equivalent Ag(1)Te6 octahedra, edges with four equivalent Pb(2)Te6 octahedra, and edges with eight equivalent Pb(3)Te6 octahedra. The corner-sharing octahedra are not tilted. There are five inequivalent Te sites. In the first Te site, Te(1) is bonded to one Pb(1), one Pb(2), and four equivalent Pb(3) atoms to form TePb6 octahedra that share corners with six equivalent Te(1)Pb6 octahedra, edges with two equivalent Te(4)AgPb5 octahedra, edges with two equivalent Te(5)SbPb5 octahedra, edges with four equivalent Te(3)AgSbPb4 octahedra, and edges with four equivalent Te(2)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Te site, Te(2) is bonded to two Pb(1,1); two equivalent Pb(3); and two equivalent Pb(4) atoms to form TePb6 octahedra that share corners with two equivalent Te(3)AgSbPb4 octahedra, corners with four equivalent Te(2)Pb6 octahedra, edges with two equivalent Te(4)AgPb5 octahedra, edges with two equivalent Te(5)SbPb5 octahedra, edges with four equivalent Te(1)Pb6 octahedra, and edges with four equivalent Te(2)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the third Te site, Te(3) is bonded to one Ag(1), two equivalent Pb(2), two equivalent Pb(3), and one Sb(1) atom to form TeAgSbPb4 octahedra that share corners with two equivalent Te(2)Pb6 octahedra, corners with four equivalent Te(3)AgSbPb4 octahedra, edges with two equivalent Te(4)AgPb5 octahedra, edges with two equivalent Te(5)SbPb5 octahedra, edges with four equivalent Te(3)AgSbPb4 octahedra, and edges with four equivalent Te(1)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fourth Te site, Te(4) is bonded to one Ag(1), one Pb(4), and four equivalent Pb(3) atoms to form TeAgPb5 octahedra that share  a cornercorner with one Te(4)AgPb5 octahedra, corners with five equivalent Te(5)SbPb5 octahedra, edges with four equivalent Te(3)AgSbPb4 octahedra, edges with four equivalent Te(1)Pb6 octahedra, and edges with four equivalent Te(2)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the fifth Te site, Te(5) is bonded to one Pb(4), four equivalent Pb(3), and one Sb(1) atom to form TeSbPb5 octahedra that share  a cornercorner with one Te(5)SbPb5 octahedra, corners with five equivalent Te(4)AgPb5 octahedra, edges with four equivalent Te(3)AgSbPb4 octahedra, edges with four equivalent Te(1)Pb6 octahedra, and edges with four equivalent Te(2)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. is represented by the CIF card [CIF]
data_AgSb(Te8Pb7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.459
_cell_length_b   14.459
_cell_length_c   14.459
_cell_angle_alpha   142.735
_cell_angle_beta   142.735
_cell_angle_gamma   53.723
_symmetry_Int_Tables_number   1
_cell_volume   1101.172
_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  0.500  0.500  0.000  1.0
  Sb  Sb1  1  0.000  0.000  0.000  1.0
  Te  Te2  1  0.125  0.625  0.500  1.0
  Te  Te3  1  0.375  0.875  0.500  1.0
  Te  Te4  1  0.625  0.125  0.500  1.0
  Te  Te5  1  0.875  0.375  0.500  1.0
  Te  Te6  1  0.500  0.500  0.500  1.0
  Te  Te7  1  0.757  0.757  0.515  1.0
  Te  Te8  1  0.000  0.000  0.500  1.0
  Te  Te9  1  0.243  0.243  0.485  1.0
  Te  Te10  1  0.616  0.616  0.000  1.0
  Te  Te11  1  0.880  0.880  0.000  1.0
  Te  Te12  1  0.120  0.120  0.000  1.0
  Te  Te13  1  0.384  0.384  0.000  1.0
  Te  Te14  1  0.500  0.000  0.000  1.0
  Te  Te15  1  0.757  0.243  0.000  1.0
  Te  Te16  1  0.000  0.500  0.000  1.0
  Te  Te17  1  0.243  0.757  0.000  1.0
  Pb  Pb18  1  0.250  0.750  0.500  1.0
  Pb  Pb19  1  0.500  0.000  0.500  1.0
  Pb  Pb20  1  0.750  0.250  0.500  1.0
  Pb  Pb21  1  0.000  0.500  0.500  1.0
  Pb  Pb22  1  0.375  0.375  0.501  1.0
  Pb  Pb23  1  0.625  0.625  0.499  1.0
  Pb  Pb24  1  0.873  0.873  0.499  1.0
  Pb  Pb25  1  0.127  0.127  0.501  1.0
  Pb  Pb26  1  0.375  0.873  0.000  1.0
  Pb  Pb27  1  0.625  0.127  0.000  1.0
  Pb  Pb28  1  0.873  0.375  0.000  1.0
  Pb  Pb29  1  0.127  0.625  0.000  1.0
  Pb  Pb30  1  0.748  0.748  0.000  1.0
  Pb  Pb31  1  0.252  0.252  0.000  1.0
[/CIF]
.
The crystal structure described by AgSb(Pb7Te8)2 is alpha Po-derived structured and crystallizes in the tetragonal I4/mmm space group. Ag(1) is bonded to two equivalent Te(4) and four equivalent Te(3) atoms to form AgTe6 octahedra that share corners with two equivalent Pb(4)Te6 octahedra, corners with four equivalent Sb(1)Te6 octahedra, edges with four equivalent Pb(2)Te6 octahedra, and edges with eight equivalent Pb(3)Te6 octahedra. The corner-sharing octahedra are not tilted. There are seven inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form a mixture of corner and edge-sharing PbTe6 octahedra. The corner-sharing octahedra are not tilted. In the second Pb site, Pb(2) is bonded to two equivalent Te(1) and four equivalent Te(3) atoms to form PbTe6 octahedra that share corners with two Pb(1,1)Te6 octahedra; corners with four equivalent Pb(2)Te6 octahedra; edges with two equivalent Ag(1)Te6 octahedra; edges with two equivalent Sb(1)Te6 octahedra; and edges with eight equivalent Pb(3)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third Pb site, Pb(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form a mixture of corner and edge-sharing PbTe6 octahedra. The corner-sharing octahedra are not tilted. In the fourth Pb site, Pb(3) is bonded to one Te(2), one Te(3), one Te(4), one Te(5), and two equivalent Te(1) atoms to form PbTe6 octahedra that share corners with six equivalent Pb(3)Te6 octahedra;  an edgeedge with one Ag(1)Te6 octahedra;  an edgeedge with one Sb(1)Te6 octahedra; edges with two Pb(1,1)Te6 octahedra; edges with two equivalent Pb(2)Te6 octahedra; edges with two equivalent Pb(4)Te6 octahedra; and edges with four equivalent Pb(3)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. In the fifth Pb site, Pb(4) is bonded to one Te(4), one Te(5), and four equivalent Te(2) atoms to form PbTe6 octahedra that share  a cornercorner with one Ag(1)Te6 octahedra;  a cornercorner with one Sb(1)Te6 octahedra; corners with four equivalent Pb(4)Te6 octahedra; edges with four Pb(1,1)Te6 octahedra; and edges with eight equivalent Pb(3)Te6 octahedra. The corner-sharing octahedra are not tilted. In the sixth Pb site, Pb(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form a mixture of corner and edge-sharing PbTe6 octahedra. The corner-sharing octahedra are not tilted. In the seventh Pb site, Pb(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form a mixture of corner and edge-sharing PbTe6 octahedra. The corner-sharing octahedra are not tilted. Sb(1) is bonded to two equivalent Te(5) and four equivalent Te(3) atoms to form SbTe6 octahedra that share corners with two equivalent Pb(4)Te6 octahedra, corners with four equivalent Ag(1)Te6 octahedra, edges with four equivalent Pb(2)Te6 octahedra, and edges with eight equivalent Pb(3)Te6 octahedra. The corner-sharing octahedra are not tilted. There are five inequivalent Te sites. In the first Te site, Te(1) is bonded to one Pb(1), one Pb(2), and four equivalent Pb(3) atoms to form TePb6 octahedra that share corners with six equivalent Te(1)Pb6 octahedra, edges with two equivalent Te(4)AgPb5 octahedra, edges with two equivalent Te(5)SbPb5 octahedra, edges with four equivalent Te(3)AgSbPb4 octahedra, and edges with four equivalent Te(2)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Te site, Te(2) is bonded to two Pb(1,1); two equivalent Pb(3); and two equivalent Pb(4) atoms to form TePb6 octahedra that share corners with two equivalent Te(3)AgSbPb4 octahedra, corners with four equivalent Te(2)Pb6 octahedra, edges with two equivalent Te(4)AgPb5 octahedra, edges with two equivalent Te(5)SbPb5 octahedra, edges with four equivalent Te(1)Pb6 octahedra, and edges with four equivalent Te(2)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the third Te site, Te(3) is bonded to one Ag(1), two equivalent Pb(2), two equivalent Pb(3), and one Sb(1) atom to form TeAgSbPb4 octahedra that share corners with two equivalent Te(2)Pb6 octahedra, corners with four equivalent Te(3)AgSbPb4 octahedra, edges with two equivalent Te(4)AgPb5 octahedra, edges with two equivalent Te(5)SbPb5 octahedra, edges with four equivalent Te(3)AgSbPb4 octahedra, and edges with four equivalent Te(1)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fourth Te site, Te(4) is bonded to one Ag(1), one Pb(4), and four equivalent Pb(3) atoms to form TeAgPb5 octahedra that share  a cornercorner with one Te(4)AgPb5 octahedra, corners with five equivalent Te(5)SbPb5 octahedra, edges with four equivalent Te(3)AgSbPb4 octahedra, edges with four equivalent Te(1)Pb6 octahedra, and edges with four equivalent Te(2)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the fifth Te site, Te(5) is bonded to one Pb(4), four equivalent Pb(3), and one Sb(1) atom to form TeSbPb5 octahedra that share  a cornercorner with one Te(5)SbPb5 octahedra, corners with five equivalent Te(4)AgPb5 octahedra, edges with four equivalent Te(3)AgSbPb4 octahedra, edges with four equivalent Te(1)Pb6 octahedra, and edges with four equivalent Te(2)Pb6 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. is represented by the CIF card [CIF]
data_AgSb(Te8Pb7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.459
_cell_length_b   14.459
_cell_length_c   14.459
_cell_angle_alpha   142.735
_cell_angle_beta   142.735
_cell_angle_gamma   53.723
_symmetry_Int_Tables_number   1
_cell_volume   1101.172
_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  0.500  0.500  0.000  1.0
  Sb  Sb1  1  0.000  0.000  0.000  1.0
  Te  Te2  1  0.125  0.625  0.500  1.0
  Te  Te3  1  0.375  0.875  0.500  1.0
  Te  Te4  1  0.625  0.125  0.500  1.0
  Te  Te5  1  0.875  0.375  0.500  1.0
  Te  Te6  1  0.500  0.500  0.500  1.0
  Te  Te7  1  0.757  0.757  0.515  1.0
  Te  Te8  1  0.000  0.000  0.500  1.0
  Te  Te9  1  0.243  0.243  0.485  1.0
  Te  Te10  1  0.616  0.616  0.000  1.0
  Te  Te11  1  0.880  0.880  0.000  1.0
  Te  Te12  1  0.120  0.120  0.000  1.0
  Te  Te13  1  0.384  0.384  0.000  1.0
  Te  Te14  1  0.500  0.000  0.000  1.0
  Te  Te15  1  0.757  0.243  0.000  1.0
  Te  Te16  1  0.000  0.500  0.000  1.0
  Te  Te17  1  0.243  0.757  0.000  1.0
  Pb  Pb18  1  0.250  0.750  0.500  1.0
  Pb  Pb19  1  0.500  0.000  0.500  1.0
  Pb  Pb20  1  0.750  0.250  0.500  1.0
  Pb  Pb21  1  0.000  0.500  0.500  1.0
  Pb  Pb22  1  0.375  0.375  0.501  1.0
  Pb  Pb23  1  0.625  0.625  0.499  1.0
  Pb  Pb24  1  0.873  0.873  0.499  1.0
  Pb  Pb25  1  0.127  0.127  0.501  1.0
  Pb  Pb26  1  0.375  0.873  0.000  1.0
  Pb  Pb27  1  0.625  0.127  0.000  1.0
  Pb  Pb28  1  0.873  0.375  0.000  1.0
  Pb  Pb29  1  0.127  0.625  0.000  1.0
  Pb  Pb30  1  0.748  0.748  0.000  1.0
  Pb  Pb31  1  0.252  0.252  0.000  1.0
[/CIF]
.