The material described by AgCu3In4Te8 is Stannite-like structured and crystallizes in the triclinic P1 space group. Ag(1) is bonded to one Te(1), one Te(4), one Te(5), and one Te(7) atom to form AgTe4 tetrahedra that share  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one In(4)Te4 tetrahedra, corners with two equivalent In(1)Te4 tetrahedra, corners with two equivalent In(2)Te4 tetrahedra, corners with three equivalent Cu(2)Te4 tetrahedra, and corners with three equivalent In(3)Te4 tetrahedra. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Te(2), one Te(3), one Te(6), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one In(3)Te4 tetrahedra, corners with two equivalent In(1)Te4 tetrahedra, corners with two equivalent In(2)Te4 tetrahedra, corners with three equivalent Cu(3)Te4 tetrahedra, and corners with three equivalent In(4)Te4 tetrahedra. In the second Cu site, Cu(2) is bonded to one Te(1), one Te(4), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one In(2)Te4 tetrahedra, corners with two equivalent In(3)Te4 tetrahedra, corners with two equivalent In(4)Te4 tetrahedra, corners with three equivalent Ag(1)Te4 tetrahedra, and corners with three equivalent In(1)Te4 tetrahedra. In the third Cu site, Cu(3) is bonded to one Te(2), one Te(3), one Te(6), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Ag(1)Te4 tetrahedra,  a cornercorner with one In(1)Te4 tetrahedra, corners with two equivalent In(3)Te4 tetrahedra, corners with two equivalent In(4)Te4 tetrahedra, corners with three equivalent Cu(1)Te4 tetrahedra, and corners with three equivalent In(2)Te4 tetrahedra. There are four inequivalent In sites. In the first In site, In(1) is bonded to one Te(1), one Te(3), one Te(5), and one Te(8) atom to form InTe4 tetrahedra that share  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one In(3)Te4 tetrahedra, corners with two equivalent Ag(1)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with three equivalent Cu(2)Te4 tetrahedra, and corners with three equivalent In(4)Te4 tetrahedra. In the second In site, In(2) is bonded to one Te(2), one Te(4), one Te(6), and one Te(7) atom to form InTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one In(4)Te4 tetrahedra, corners with two equivalent Ag(1)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with three equivalent Cu(3)Te4 tetrahedra, and corners with three equivalent In(3)Te4 tetrahedra. In the third In site, In(3) is bonded to one Te(2), one Te(4), one Te(5), and one Te(7) atom to form InTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one In(1)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with three equivalent Ag(1)Te4 tetrahedra, and corners with three equivalent In(2)Te4 tetrahedra. In the fourth In site, In(4) is bonded to one Te(1), one Te(3), one Te(6), and one Te(8) atom to form InTe4 tetrahedra that share  a cornercorner with one Ag(1)Te4 tetrahedra,  a cornercorner with one In(2)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with three equivalent Cu(1)Te4 tetrahedra, and corners with three equivalent In(1)Te4 tetrahedra. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded to one Ag(1), one Cu(2), one In(1), and one In(4) atom to form TeIn2CuAg tetrahedra that share  a cornercorner with one Te(6)In2Cu2 tetrahedra,  a cornercorner with one Te(7)In2CuAg tetrahedra, corners with two equivalent Te(3)In2Cu2 tetrahedra, corners with two equivalent Te(4)In2CuAg tetrahedra, corners with three equivalent Te(8)In2Cu2 tetrahedra, and corners with three equivalent Te(5)In2CuAg tetrahedra. In the second Te site, Te(2) is bonded to one Cu(1), one Cu(3), one In(2), and one In(3) atom to form TeIn2Cu2 tetrahedra that share  a cornercorner with one Te(8)In2Cu2 tetrahedra,  a cornercorner with one Te(5)In2CuAg tetrahedra, corners with two equivalent Te(3)In2Cu2 tetrahedra, corners with two equivalent Te(4)In2CuAg tetrahedra, corners with three equivalent Te(6)In2Cu2 tetrahedra, and corners with three equivalent Te(7)In2CuAg tetrahedra. In the third Te site, Te(3) is bonded to one Cu(1), one Cu(3), one In(1), and one In(4) atom to form TeIn2Cu2 tetrahedra that share  a cornercorner with one Te(5)In2CuAg tetrahedra,  a cornercorner with one Te(7)In2CuAg tetrahedra, corners with two equivalent Te(2)In2Cu2 tetrahedra, corners with two equivalent Te(1)In2CuAg tetrahedra, corners with three equivalent Te(6)In2Cu2 tetrahedra, and corners with three equivalent Te(8)In2Cu2 tetrahedra. In the fourth Te site, Te(4) is bonded to one Ag(1), one Cu(2), one In(2), and one In(3) atom to form TeIn2CuAg tetrahedra that share  a cornercorner with one Te(6)In2Cu2 tetrahedra,  a cornercorner with one Te(8)In2Cu2 tetrahedra, corners with two equivalent Te(2)In2Cu2 tetrahedra, corners with two equivalent Te(1)In2CuAg tetrahedra, corners with three equivalent Te(5)In2CuAg tetrahedra, and corners with three equivalent Te(7)In2CuAg tetrahedra. In the fifth Te site, Te(5) is bonded to one Ag(1), one Cu(2), one In(1), and one In(3) atom to form TeIn2CuAg tetrahedra that share  a cornercorner with one Te(2)In2Cu2 tetrahedra,  a cornercorner with one Te(3)In2Cu2 tetrahedra, corners with two equivalent Te(8)In2Cu2 tetrahedra, corners with two equivalent Te(7)In2CuAg tetrahedra, corners with three equivalent Te(1)In2CuAg tetrahedra, and corners with three equivalent Te(4)In2CuAg tetrahedra. In the sixth Te site, Te(6) is bonded to one Cu(1), one Cu(3), one In(2), and one In(4) atom to form TeIn2Cu2 tetrahedra that share  a cornercorner with one Te(1)In2CuAg tetrahedra,  a cornercorner with one Te(4)In2CuAg tetrahedra, corners with two equivalent Te(8)In2Cu2 tetrahedra, corners with two equivalent Te(7)In2CuAg tetrahedra, corners with three equivalent Te(2)In2Cu2 tetrahedra, and corners with three equivalent Te(3)In2Cu2 tetrahedra. In the seventh Te site, Te(7) is bonded to one Ag(1), one Cu(3), one In(2), and one In(3) atom to form TeIn2CuAg tetrahedra that share  a cornercorner with one Te(3)In2Cu2 tetrahedra,  a cornercorner with one Te(1)In2CuAg tetrahedra, corners with two equivalent Te(6)In2Cu2 tetrahedra, corners with two equivalent Te(5)In2CuAg tetrahedra, corners with three equivalent Te(2)In2Cu2 tetrahedra, and corners with three equivalent Te(4)In2CuAg tetrahedra. In the eighth Te site, Te(8) is bonded to one Cu(1), one Cu(2), one In(1), and one In(4) atom to form TeIn2Cu2 tetrahedra that share  a cornercorner with one Te(2)In2Cu2 tetrahedra,  a cornercorner with one Te(4)In2CuAg tetrahedra, corners with two equivalent Te(6)In2Cu2 tetrahedra, corners with two equivalent Te(5)In2CuAg tetrahedra, corners with three equivalent Te(3)In2Cu2 tetrahedra, and corners with three equivalent Te(1)In2CuAg tetrahedra. is represented by the CIF file [CIF]
data_In4Cu3AgTe8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.367
_cell_length_b   7.759
_cell_length_c   11.876
_cell_angle_alpha   77.635
_cell_angle_beta   74.450
_cell_angle_gamma   65.773
_symmetry_Int_Tables_number   1
_cell_volume   511.822
_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
  In  In0  1  0.250  0.373  0.127  1.0
  In  In1  1  0.250  0.877  0.623  1.0
  In  In2  1  0.500  0.250  0.749  1.0
  In  In3  1  0.500  0.750  0.251  1.0
  Cu  Cu4  1  0.750  0.125  0.375  1.0
  Cu  Cu5  1  0.999  0.000  0.001  1.0
  Cu  Cu6  1  0.001  0.500  0.499  1.0
  Ag  Ag7  1  0.750  0.625  0.875  1.0
  Te  Te8  1  0.356  0.708  0.054  1.0
  Te  Te9  1  0.375  0.205  0.545  1.0
  Te  Te10  1  0.875  0.419  0.330  1.0
  Te  Te11  1  0.882  0.936  0.827  1.0
  Te  Te12  1  0.109  0.296  0.941  1.0
  Te  Te13  1  0.089  0.813  0.438  1.0
  Te  Te14  1  0.654  0.560  0.678  1.0
  Te  Te15  1  0.660  0.063  0.188  1.0
[/CIF]
.
The material described by AgCu3In4Te8 is Stannite-like structured and crystallizes in the triclinic P1 space group. Ag(1) is bonded to one Te(1), one Te(4), one Te(5), and one Te(7) atom to form AgTe4 tetrahedra that share  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one In(4)Te4 tetrahedra, corners with two equivalent In(1)Te4 tetrahedra, corners with two equivalent In(2)Te4 tetrahedra, corners with three equivalent Cu(2)Te4 tetrahedra, and corners with three equivalent In(3)Te4 tetrahedra. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Te(2), one Te(3), one Te(6), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one In(3)Te4 tetrahedra, corners with two equivalent In(1)Te4 tetrahedra, corners with two equivalent In(2)Te4 tetrahedra, corners with three equivalent Cu(3)Te4 tetrahedra, and corners with three equivalent In(4)Te4 tetrahedra. In the second Cu site, Cu(2) is bonded to one Te(1), one Te(4), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one In(2)Te4 tetrahedra, corners with two equivalent In(3)Te4 tetrahedra, corners with two equivalent In(4)Te4 tetrahedra, corners with three equivalent Ag(1)Te4 tetrahedra, and corners with three equivalent In(1)Te4 tetrahedra. In the third Cu site, Cu(3) is bonded to one Te(2), one Te(3), one Te(6), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Ag(1)Te4 tetrahedra,  a cornercorner with one In(1)Te4 tetrahedra, corners with two equivalent In(3)Te4 tetrahedra, corners with two equivalent In(4)Te4 tetrahedra, corners with three equivalent Cu(1)Te4 tetrahedra, and corners with three equivalent In(2)Te4 tetrahedra. There are four inequivalent In sites. In the first In site, In(1) is bonded to one Te(1), one Te(3), one Te(5), and one Te(8) atom to form InTe4 tetrahedra that share  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one In(3)Te4 tetrahedra, corners with two equivalent Ag(1)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with three equivalent Cu(2)Te4 tetrahedra, and corners with three equivalent In(4)Te4 tetrahedra. In the second In site, In(2) is bonded to one Te(2), one Te(4), one Te(6), and one Te(7) atom to form InTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one In(4)Te4 tetrahedra, corners with two equivalent Ag(1)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with three equivalent Cu(3)Te4 tetrahedra, and corners with three equivalent In(3)Te4 tetrahedra. In the third In site, In(3) is bonded to one Te(2), one Te(4), one Te(5), and one Te(7) atom to form InTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one In(1)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with three equivalent Ag(1)Te4 tetrahedra, and corners with three equivalent In(2)Te4 tetrahedra. In the fourth In site, In(4) is bonded to one Te(1), one Te(3), one Te(6), and one Te(8) atom to form InTe4 tetrahedra that share  a cornercorner with one Ag(1)Te4 tetrahedra,  a cornercorner with one In(2)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with three equivalent Cu(1)Te4 tetrahedra, and corners with three equivalent In(1)Te4 tetrahedra. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded to one Ag(1), one Cu(2), one In(1), and one In(4) atom to form TeIn2CuAg tetrahedra that share  a cornercorner with one Te(6)In2Cu2 tetrahedra,  a cornercorner with one Te(7)In2CuAg tetrahedra, corners with two equivalent Te(3)In2Cu2 tetrahedra, corners with two equivalent Te(4)In2CuAg tetrahedra, corners with three equivalent Te(8)In2Cu2 tetrahedra, and corners with three equivalent Te(5)In2CuAg tetrahedra. In the second Te site, Te(2) is bonded to one Cu(1), one Cu(3), one In(2), and one In(3) atom to form TeIn2Cu2 tetrahedra that share  a cornercorner with one Te(8)In2Cu2 tetrahedra,  a cornercorner with one Te(5)In2CuAg tetrahedra, corners with two equivalent Te(3)In2Cu2 tetrahedra, corners with two equivalent Te(4)In2CuAg tetrahedra, corners with three equivalent Te(6)In2Cu2 tetrahedra, and corners with three equivalent Te(7)In2CuAg tetrahedra. In the third Te site, Te(3) is bonded to one Cu(1), one Cu(3), one In(1), and one In(4) atom to form TeIn2Cu2 tetrahedra that share  a cornercorner with one Te(5)In2CuAg tetrahedra,  a cornercorner with one Te(7)In2CuAg tetrahedra, corners with two equivalent Te(2)In2Cu2 tetrahedra, corners with two equivalent Te(1)In2CuAg tetrahedra, corners with three equivalent Te(6)In2Cu2 tetrahedra, and corners with three equivalent Te(8)In2Cu2 tetrahedra. In the fourth Te site, Te(4) is bonded to one Ag(1), one Cu(2), one In(2), and one In(3) atom to form TeIn2CuAg tetrahedra that share  a cornercorner with one Te(6)In2Cu2 tetrahedra,  a cornercorner with one Te(8)In2Cu2 tetrahedra, corners with two equivalent Te(2)In2Cu2 tetrahedra, corners with two equivalent Te(1)In2CuAg tetrahedra, corners with three equivalent Te(5)In2CuAg tetrahedra, and corners with three equivalent Te(7)In2CuAg tetrahedra. In the fifth Te site, Te(5) is bonded to one Ag(1), one Cu(2), one In(1), and one In(3) atom to form TeIn2CuAg tetrahedra that share  a cornercorner with one Te(2)In2Cu2 tetrahedra,  a cornercorner with one Te(3)In2Cu2 tetrahedra, corners with two equivalent Te(8)In2Cu2 tetrahedra, corners with two equivalent Te(7)In2CuAg tetrahedra, corners with three equivalent Te(1)In2CuAg tetrahedra, and corners with three equivalent Te(4)In2CuAg tetrahedra. In the sixth Te site, Te(6) is bonded to one Cu(1), one Cu(3), one In(2), and one In(4) atom to form TeIn2Cu2 tetrahedra that share  a cornercorner with one Te(1)In2CuAg tetrahedra,  a cornercorner with one Te(4)In2CuAg tetrahedra, corners with two equivalent Te(8)In2Cu2 tetrahedra, corners with two equivalent Te(7)In2CuAg tetrahedra, corners with three equivalent Te(2)In2Cu2 tetrahedra, and corners with three equivalent Te(3)In2Cu2 tetrahedra. In the seventh Te site, Te(7) is bonded to one Ag(1), one Cu(3), one In(2), and one In(3) atom to form TeIn2CuAg tetrahedra that share  a cornercorner with one Te(3)In2Cu2 tetrahedra,  a cornercorner with one Te(1)In2CuAg tetrahedra, corners with two equivalent Te(6)In2Cu2 tetrahedra, corners with two equivalent Te(5)In2CuAg tetrahedra, corners with three equivalent Te(2)In2Cu2 tetrahedra, and corners with three equivalent Te(4)In2CuAg tetrahedra. In the eighth Te site, Te(8) is bonded to one Cu(1), one Cu(2), one In(1), and one In(4) atom to form TeIn2Cu2 tetrahedra that share  a cornercorner with one Te(2)In2Cu2 tetrahedra,  a cornercorner with one Te(4)In2CuAg tetrahedra, corners with two equivalent Te(6)In2Cu2 tetrahedra, corners with two equivalent Te(5)In2CuAg tetrahedra, corners with three equivalent Te(3)In2Cu2 tetrahedra, and corners with three equivalent Te(1)In2CuAg tetrahedra. is represented by the CIF file [CIF]
data_In4Cu3AgTe8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.367
_cell_length_b   7.759
_cell_length_c   11.876
_cell_angle_alpha   77.635
_cell_angle_beta   74.450
_cell_angle_gamma   65.773
_symmetry_Int_Tables_number   1
_cell_volume   511.822
_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
  In  In0  1  0.250  0.373  0.127  1.0
  In  In1  1  0.250  0.877  0.623  1.0
  In  In2  1  0.500  0.250  0.749  1.0
  In  In3  1  0.500  0.750  0.251  1.0
  Cu  Cu4  1  0.750  0.125  0.375  1.0
  Cu  Cu5  1  0.999  0.000  0.001  1.0
  Cu  Cu6  1  0.001  0.500  0.499  1.0
  Ag  Ag7  1  0.750  0.625  0.875  1.0
  Te  Te8  1  0.356  0.708  0.054  1.0
  Te  Te9  1  0.375  0.205  0.545  1.0
  Te  Te10  1  0.875  0.419  0.330  1.0
  Te  Te11  1  0.882  0.936  0.827  1.0
  Te  Te12  1  0.109  0.296  0.941  1.0
  Te  Te13  1  0.089  0.813  0.438  1.0
  Te  Te14  1  0.654  0.560  0.678  1.0
  Te  Te15  1  0.660  0.063  0.188  1.0
[/CIF]
.