The material described by Ag8GeTe6 crystallizes in the triclinic P1 space group. There are sixteen inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 6-coordinate geometry to one Ag(10), one Ag(13), one Ag(4), one Ag(6), one Te(2), and one Te(5) atom. In the second Ag site, Ag(2) is bonded in a 4-coordinate geometry to one Ag(12), one Ag(5), one Te(10), one Te(3), one Te(6), and one Te(7) atom. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one Ag(6), one Ag(8), one Te(2), one Te(3), one Te(4), and one Te(8) atom. In the fourth Ag site, Ag(4) is bonded in a 5-coordinate geometry to one Ag(1), one Te(1), one Te(2), one Te(5), and one Te(7) atom. In the fifth Ag site, Ag(5) is bonded in a 7-coordinate geometry to one Ag(14), one Ag(2), one Ag(8), one Te(3), one Te(6), one Te(7), and one Te(8) atom. In the sixth Ag site, Ag(6) is bonded in a 8-coordinate geometry to one Ag(1), one Ag(13), one Ag(3), one Ag(9), one Te(1), one Te(2), one Te(5), and one Te(8) atom. In the seventh Ag site, Ag(7) is bonded in a rectangular see-saw-like geometry to one Te(10), one Te(11), one Te(6), and one Te(9) atom. In the eighth Ag site, Ag(8) is bonded in a 7-coordinate geometry to one Ag(3), one Ag(5), one Ag(9), one Te(2), one Te(3), one Te(7), and one Te(8) atom. In the ninth Ag site, Ag(9) is bonded to one Ag(10), one Ag(6), one Ag(8), one Te(1), one Te(2), one Te(5), and one Te(8) atom to form distorted AgAg3Te4 hexagonal pyramids that share  a cornercorner with one Te(7)Ag4Ge square pyramid,  a cornercorner with one Ge(1)Te4 tetrahedra, and  a cornercorner with one Ge(2)Te4 tetrahedra. In the tenth Ag site, Ag(10) is bonded in a 8-coordinate geometry to one Ag(1), one Ag(11), one Ag(13), one Ag(9), one Te(1), one Te(12), one Te(2), and one Te(9) atom. In the eleventh Ag site, Ag(11) is bonded in a 7-coordinate geometry to one Ag(10), one Ag(14), one Ag(15), one Te(1), one Te(12), one Te(6), and one Te(9) atom. In the twelfth Ag site, Ag(12) is bonded in a 7-coordinate geometry to one Ag(15), one Ag(16), one Ag(2), one Te(10), one Te(11), one Te(3), and one Te(6) atom. In the thirteenth Ag site, Ag(13) is bonded in a 8-coordinate geometry to one Ag(1), one Ag(10), one Ag(15), one Ag(6), one Te(1), one Te(11), one Te(12), and one Te(2) atom. In the fourteenth Ag site, Ag(14) is bonded in a 7-coordinate geometry to one Ag(11), one Ag(16), one Ag(5), one Te(10), one Te(12), one Te(3), and one Te(6) atom. In the fifteenth Ag site, Ag(15) is bonded in a 6-coordinate geometry to one Ag(11), one Ag(12), one Ag(13), one Te(1), one Te(11), one Te(12), and one Te(6) atom. In the sixteenth Ag site, Ag(16) is bonded in a 4-coordinate geometry to one Ag(12), one Ag(14), one Te(10), one Te(3), and one Te(6) atom. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Te(10), one Te(4), one Te(7), and one Te(8) atom to form GeTe4 tetrahedra that share  a cornercorner with one Ag(9)Ag3Te4 hexagonal pyramid. In the second Ge site, Ge(2) is bonded to one Te(11), one Te(12), one Te(5), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Ag(9)Ag3Te4 hexagonal pyramid. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded in a 7-coordinate geometry to one Ag(10), one Ag(11), one Ag(13), one Ag(15), one Ag(4), one Ag(6), and one Ag(9) atom. In the second Te site, Te(2) is bonded in a 8-coordinate geometry to one Ag(1), one Ag(10), one Ag(13), one Ag(3), one Ag(4), one Ag(6), one Ag(8), and one Ag(9) atom. In the third Te site, Te(3) is bonded in a 7-coordinate geometry to one Ag(12), one Ag(14), one Ag(16), one Ag(2), one Ag(3), one Ag(5), and one Ag(8) atom. In the fourth Te site, Te(4) is bonded in an L-shaped geometry to one Ag(3) and one Ge(1) atom. In the fifth Te site, Te(5) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(4), one Ag(6), one Ag(9), and one Ge(2) atom. In the sixth Te site, Te(6) is bonded to one Ag(11), one Ag(12), one Ag(14), one Ag(15), one Ag(16), one Ag(2), one Ag(5), and one Ag(7) atom to form distorted edge-sharing TeAg8 hexagonal bipyramids. In the seventh Te site, Te(7) is bonded to one Ag(2), one Ag(4), one Ag(5), one Ag(8), and one Ge(1) atom to form distorted TeAg4Ge square pyramids that share  a cornercorner with one Ag(9)Ag3Te4 hexagonal pyramid and  an edgeedge with one Te(6)Ag8 hexagonal bipyramid. In the eighth Te site, Te(8) is bonded in a distorted hexagonal planar geometry to one Ag(3), one Ag(5), one Ag(6), one Ag(8), one Ag(9), and one Ge(1) atom. In the ninth Te site, Te(9) is bonded in a 4-coordinate geometry to one Ag(10), one Ag(11), one Ag(7), and one Ge(2) atom. In the tenth Te site, Te(10) is bonded in a distorted hexagonal planar geometry to one Ag(12), one Ag(14), one Ag(16), one Ag(2), one Ag(7), and one Ge(1) atom. In the eleventh Te site, Te(11) is bonded in a 5-coordinate geometry to one Ag(12), one Ag(13), one Ag(15), one Ag(7), and one Ge(2) atom. In the twelfth Te site, Te(12) is bonded in a 6-coordinate geometry to one Ag(10), one Ag(11), one Ag(13), one Ag(14), one Ag(15), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ag8GeTe6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.362
_cell_length_b   8.384
_cell_length_c   14.578
_cell_angle_alpha   73.295
_cell_angle_beta   73.712
_cell_angle_gamma   60.395
_symmetry_Int_Tables_number   1
_cell_volume   839.296
_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
  Ag  Ag0  1  0.480  0.564  0.908  1.0
  Ag  Ag1  1  0.529  0.827  0.497  1.0
  Ag  Ag2  1  0.191  0.567  0.663  1.0
  Ag  Ag3  1  0.336  0.969  0.898  1.0
  Ag  Ag4  1  0.707  0.066  0.540  1.0
  Ag  Ag5  1  0.100  0.737  0.852  1.0
  Ag  Ag6  1  0.099  0.048  0.315  1.0
  Ag  Ag7  1  0.535  0.239  0.701  1.0
  Ag  Ag8  1  0.750  0.071  0.864  1.0
  Ag  Ag9  1  0.542  0.209  0.038  1.0
  Ag  Ag10  1  0.719  0.040  0.208  1.0
  Ag  Ag11  1  0.831  0.530  0.395  1.0
  Ag  Ag12  1  0.146  0.553  0.046  1.0
  Ag  Ag13  1  0.541  0.248  0.369  1.0
  Ag  Ag14  1  0.064  0.716  0.206  1.0
  Ag  Ag15  1  0.201  0.552  0.419  1.0
  Ge  Ge16  1  0.121  0.163  0.632  1.0
  Ge  Ge17  1  0.630  0.642  0.127  1.0
  Te  Te18  1  0.996  0.964  0.004  1.0
  Te  Te19  1  0.340  0.339  0.881  1.0
  Te  Te20  1  0.504  0.486  0.505  1.0
  Te  Te21  1  0.911  0.461  0.699  1.0
  Te  Te22  1  0.702  0.695  0.938  1.0
  Te  Te23  1  0.871  0.870  0.383  1.0
  Te  Te24  1  0.446  0.934  0.687  1.0
  Te  Te25  1  0.949  0.951  0.679  1.0
  Te  Te26  1  0.439  0.954  0.190  1.0
  Te  Te27  1  0.201  0.189  0.440  1.0
  Te  Te28  1  0.931  0.430  0.208  1.0
  Te  Te29  1  0.444  0.444  0.183  1.0
[/CIF]
.
The material described by Ag8GeTe6 crystallizes in the triclinic P1 space group. There are sixteen inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 6-coordinate geometry to one Ag(10), one Ag(13), one Ag(4), one Ag(6), one Te(2), and one Te(5) atom. In the second Ag site, Ag(2) is bonded in a 4-coordinate geometry to one Ag(12), one Ag(5), one Te(10), one Te(3), one Te(6), and one Te(7) atom. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one Ag(6), one Ag(8), one Te(2), one Te(3), one Te(4), and one Te(8) atom. In the fourth Ag site, Ag(4) is bonded in a 5-coordinate geometry to one Ag(1), one Te(1), one Te(2), one Te(5), and one Te(7) atom. In the fifth Ag site, Ag(5) is bonded in a 7-coordinate geometry to one Ag(14), one Ag(2), one Ag(8), one Te(3), one Te(6), one Te(7), and one Te(8) atom. In the sixth Ag site, Ag(6) is bonded in a 8-coordinate geometry to one Ag(1), one Ag(13), one Ag(3), one Ag(9), one Te(1), one Te(2), one Te(5), and one Te(8) atom. In the seventh Ag site, Ag(7) is bonded in a rectangular see-saw-like geometry to one Te(10), one Te(11), one Te(6), and one Te(9) atom. In the eighth Ag site, Ag(8) is bonded in a 7-coordinate geometry to one Ag(3), one Ag(5), one Ag(9), one Te(2), one Te(3), one Te(7), and one Te(8) atom. In the ninth Ag site, Ag(9) is bonded to one Ag(10), one Ag(6), one Ag(8), one Te(1), one Te(2), one Te(5), and one Te(8) atom to form distorted AgAg3Te4 hexagonal pyramids that share  a cornercorner with one Te(7)Ag4Ge square pyramid,  a cornercorner with one Ge(1)Te4 tetrahedra, and  a cornercorner with one Ge(2)Te4 tetrahedra. In the tenth Ag site, Ag(10) is bonded in a 8-coordinate geometry to one Ag(1), one Ag(11), one Ag(13), one Ag(9), one Te(1), one Te(12), one Te(2), and one Te(9) atom. In the eleventh Ag site, Ag(11) is bonded in a 7-coordinate geometry to one Ag(10), one Ag(14), one Ag(15), one Te(1), one Te(12), one Te(6), and one Te(9) atom. In the twelfth Ag site, Ag(12) is bonded in a 7-coordinate geometry to one Ag(15), one Ag(16), one Ag(2), one Te(10), one Te(11), one Te(3), and one Te(6) atom. In the thirteenth Ag site, Ag(13) is bonded in a 8-coordinate geometry to one Ag(1), one Ag(10), one Ag(15), one Ag(6), one Te(1), one Te(11), one Te(12), and one Te(2) atom. In the fourteenth Ag site, Ag(14) is bonded in a 7-coordinate geometry to one Ag(11), one Ag(16), one Ag(5), one Te(10), one Te(12), one Te(3), and one Te(6) atom. In the fifteenth Ag site, Ag(15) is bonded in a 6-coordinate geometry to one Ag(11), one Ag(12), one Ag(13), one Te(1), one Te(11), one Te(12), and one Te(6) atom. In the sixteenth Ag site, Ag(16) is bonded in a 4-coordinate geometry to one Ag(12), one Ag(14), one Te(10), one Te(3), and one Te(6) atom. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Te(10), one Te(4), one Te(7), and one Te(8) atom to form GeTe4 tetrahedra that share  a cornercorner with one Ag(9)Ag3Te4 hexagonal pyramid. In the second Ge site, Ge(2) is bonded to one Te(11), one Te(12), one Te(5), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Ag(9)Ag3Te4 hexagonal pyramid. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded in a 7-coordinate geometry to one Ag(10), one Ag(11), one Ag(13), one Ag(15), one Ag(4), one Ag(6), and one Ag(9) atom. In the second Te site, Te(2) is bonded in a 8-coordinate geometry to one Ag(1), one Ag(10), one Ag(13), one Ag(3), one Ag(4), one Ag(6), one Ag(8), and one Ag(9) atom. In the third Te site, Te(3) is bonded in a 7-coordinate geometry to one Ag(12), one Ag(14), one Ag(16), one Ag(2), one Ag(3), one Ag(5), and one Ag(8) atom. In the fourth Te site, Te(4) is bonded in an L-shaped geometry to one Ag(3) and one Ge(1) atom. In the fifth Te site, Te(5) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(4), one Ag(6), one Ag(9), and one Ge(2) atom. In the sixth Te site, Te(6) is bonded to one Ag(11), one Ag(12), one Ag(14), one Ag(15), one Ag(16), one Ag(2), one Ag(5), and one Ag(7) atom to form distorted edge-sharing TeAg8 hexagonal bipyramids. In the seventh Te site, Te(7) is bonded to one Ag(2), one Ag(4), one Ag(5), one Ag(8), and one Ge(1) atom to form distorted TeAg4Ge square pyramids that share  a cornercorner with one Ag(9)Ag3Te4 hexagonal pyramid and  an edgeedge with one Te(6)Ag8 hexagonal bipyramid. In the eighth Te site, Te(8) is bonded in a distorted hexagonal planar geometry to one Ag(3), one Ag(5), one Ag(6), one Ag(8), one Ag(9), and one Ge(1) atom. In the ninth Te site, Te(9) is bonded in a 4-coordinate geometry to one Ag(10), one Ag(11), one Ag(7), and one Ge(2) atom. In the tenth Te site, Te(10) is bonded in a distorted hexagonal planar geometry to one Ag(12), one Ag(14), one Ag(16), one Ag(2), one Ag(7), and one Ge(1) atom. In the eleventh Te site, Te(11) is bonded in a 5-coordinate geometry to one Ag(12), one Ag(13), one Ag(15), one Ag(7), and one Ge(2) atom. In the twelfth Te site, Te(12) is bonded in a 6-coordinate geometry to one Ag(10), one Ag(11), one Ag(13), one Ag(14), one Ag(15), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ag8GeTe6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.362
_cell_length_b   8.384
_cell_length_c   14.578
_cell_angle_alpha   73.295
_cell_angle_beta   73.712
_cell_angle_gamma   60.395
_symmetry_Int_Tables_number   1
_cell_volume   839.296
_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
  Ag  Ag0  1  0.480  0.564  0.908  1.0
  Ag  Ag1  1  0.529  0.827  0.497  1.0
  Ag  Ag2  1  0.191  0.567  0.663  1.0
  Ag  Ag3  1  0.336  0.969  0.898  1.0
  Ag  Ag4  1  0.707  0.066  0.540  1.0
  Ag  Ag5  1  0.100  0.737  0.852  1.0
  Ag  Ag6  1  0.099  0.048  0.315  1.0
  Ag  Ag7  1  0.535  0.239  0.701  1.0
  Ag  Ag8  1  0.750  0.071  0.864  1.0
  Ag  Ag9  1  0.542  0.209  0.038  1.0
  Ag  Ag10  1  0.719  0.040  0.208  1.0
  Ag  Ag11  1  0.831  0.530  0.395  1.0
  Ag  Ag12  1  0.146  0.553  0.046  1.0
  Ag  Ag13  1  0.541  0.248  0.369  1.0
  Ag  Ag14  1  0.064  0.716  0.206  1.0
  Ag  Ag15  1  0.201  0.552  0.419  1.0
  Ge  Ge16  1  0.121  0.163  0.632  1.0
  Ge  Ge17  1  0.630  0.642  0.127  1.0
  Te  Te18  1  0.996  0.964  0.004  1.0
  Te  Te19  1  0.340  0.339  0.881  1.0
  Te  Te20  1  0.504  0.486  0.505  1.0
  Te  Te21  1  0.911  0.461  0.699  1.0
  Te  Te22  1  0.702  0.695  0.938  1.0
  Te  Te23  1  0.871  0.870  0.383  1.0
  Te  Te24  1  0.446  0.934  0.687  1.0
  Te  Te25  1  0.949  0.951  0.679  1.0
  Te  Te26  1  0.439  0.954  0.190  1.0
  Te  Te27  1  0.201  0.189  0.440  1.0
  Te  Te28  1  0.931  0.430  0.208  1.0
  Te  Te29  1  0.444  0.444  0.183  1.0
[/CIF]
.