The material described by Bi10Te2O17I4 crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the second Bi site, Bi(2) is bonded in a 4-coordinate geometry to two equivalent O(5), two equivalent O(7), and four equivalent I(1) atoms. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to two equivalent O(6), two equivalent O(7), and four equivalent I(1) atoms. In the fourth Bi site, Bi(4) is bonded in a 4-coordinate geometry to two equivalent O(5), two equivalent O(8), and four equivalent I(1) atoms. In the fifth Bi site, Bi(5) is bonded in a 4-coordinate geometry to two equivalent O(6), two equivalent O(8), and four equivalent I(1) atoms. In the sixth Bi site, Bi(6) is bonded in a 4-coordinate geometry to two equivalent O(1), two equivalent O(4), and four equivalent I(1) atoms. In the seventh Bi site, Bi(7) is bonded in a 4-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent I(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted trigonal pyramidal geometry to two equivalent O(1) and two equivalent O(3) atoms. In the second Te site, Te(2) is bonded in a distorted square pyramidal geometry to one O(9), two equivalent O(2), and two equivalent O(4) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded to one Bi(6), two equivalent Bi(1), and one Te(1) atom to form distorted OBi3Te tetrahedra that share corners with two equivalent O(1)Bi3Te tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(8)Bi4 tetrahedra,  an edgeedge with one O(5)Bi4 tetrahedra, and edges with two equivalent O(3)Bi3Te tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Bi(7), two equivalent Bi(1), and one Te(2) atom. In the third O site, O(3) is bonded to one Bi(7), two equivalent Bi(1), and one Te(1) atom to form distorted OBi3Te tetrahedra that share corners with two equivalent O(3)Bi3Te tetrahedra, corners with two equivalent O(5)Bi4 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra,  an edgeedge with one O(8)Bi4 tetrahedra, and edges with two equivalent O(1)Bi3Te tetrahedra. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Bi(6), two equivalent Bi(1), and one Te(2) atom. In the fifth O site, O(5) is bonded to one Bi(2), one Bi(4), and two equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with two equivalent O(3)Bi3Te tetrahedra, corners with two equivalent O(5)Bi4 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra,  an edgeedge with one O(1)Bi3Te tetrahedra, edges with two equivalent O(7)Bi4 tetrahedra, and edges with two equivalent O(8)Bi4 tetrahedra. In the sixth O site, O(6) is bonded to one Bi(3), one Bi(5), and two equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with two equivalent O(1)Bi3Te tetrahedra, corners with two equivalent O(3)Bi3Te tetrahedra, corners with two equivalent O(5)Bi4 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, edges with two equivalent O(7)Bi4 tetrahedra, and edges with two equivalent O(8)Bi4 tetrahedra. In the seventh O site, O(7) is bonded to one Bi(2), one Bi(3), and two equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with two equivalent O(1)Bi3Te tetrahedra, corners with two equivalent O(3)Bi3Te tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(8)Bi4 tetrahedra, edges with two equivalent O(5)Bi4 tetrahedra, and edges with two equivalent O(6)Bi4 tetrahedra. In the eighth O site, O(8) is bonded to one Bi(4), one Bi(5), and two equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with two equivalent O(1)Bi3Te tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(8)Bi4 tetrahedra,  an edgeedge with one O(3)Bi3Te tetrahedra, edges with two equivalent O(5)Bi4 tetrahedra, and edges with two equivalent O(6)Bi4 tetrahedra. In the ninth O site, O(9) is bonded in a single-bond geometry to four equivalent Bi(1) and one Te(2) atom. I(1) is bonded in a 6-coordinate geometry to one Bi(2), one Bi(3), one Bi(4), one Bi(5), one Bi(6), and one Bi(7) atom. is represented by the CIF file [CIF]
data_Bi10Te2I4O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.663
_cell_length_b   10.663
_cell_length_c   7.990
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   136.000
_symmetry_Int_Tables_number   1
_cell_volume   631.099
_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
  Bi  Bi0  1  0.490  0.997  0.757  1.0
  Bi  Bi1  1  0.490  0.997  0.243  1.0
  Bi  Bi2  1  0.003  0.510  0.757  1.0
  Bi  Bi3  1  0.003  0.510  0.243  1.0
  Bi  Bi4  1  0.377  0.623  0.500  1.0
  Bi  Bi5  1  0.370  0.630  0.000  1.0
  Bi  Bi6  1  0.870  0.130  0.500  1.0
  Bi  Bi7  1  0.877  0.123  0.000  1.0
  Bi  Bi8  1  0.103  0.897  0.500  1.0
  Bi  Bi9  1  0.603  0.397  0.000  1.0
  Te  Te10  1  0.622  0.378  0.500  1.0
  Te  Te11  1  0.138  0.862  0.000  1.0
  I  I12  1  0.237  0.263  0.751  1.0
  I  I13  1  0.237  0.263  0.249  1.0
  I  I14  1  0.737  0.763  0.751  1.0
  I  I15  1  0.737  0.763  0.249  1.0
  O  O16  1  0.897  0.573  0.500  1.0
  O  O17  1  0.897  0.576  0.000  1.0
  O  O18  1  0.427  0.103  0.500  1.0
  O  O19  1  0.424  0.103  0.000  1.0
  O  O20  1  0.663  0.337  0.734  1.0
  O  O21  1  0.663  0.337  0.266  1.0
  O  O22  1  0.161  0.839  0.736  1.0
  O  O23  1  0.161  0.839  0.264  1.0
  O  O24  1  0.564  0.933  0.500  1.0
  O  O25  1  0.578  0.938  0.000  1.0
  O  O26  1  0.067  0.436  0.500  1.0
  O  O27  1  0.062  0.422  0.000  1.0
  O  O28  1  0.320  0.680  0.742  1.0
  O  O29  1  0.320  0.680  0.258  1.0
  O  O30  1  0.815  0.185  0.752  1.0
  O  O31  1  0.815  0.185  0.248  1.0
  O  O32  1  0.234  0.766  0.000  1.0
[/CIF]
.
The material described by Bi10Te2O17I4 crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the second Bi site, Bi(2) is bonded in a 4-coordinate geometry to two equivalent O(5), two equivalent O(7), and four equivalent I(1) atoms. In the third Bi site, Bi(3) is bonded in a 4-coordinate geometry to two equivalent O(6), two equivalent O(7), and four equivalent I(1) atoms. In the fourth Bi site, Bi(4) is bonded in a 4-coordinate geometry to two equivalent O(5), two equivalent O(8), and four equivalent I(1) atoms. In the fifth Bi site, Bi(5) is bonded in a 4-coordinate geometry to two equivalent O(6), two equivalent O(8), and four equivalent I(1) atoms. In the sixth Bi site, Bi(6) is bonded in a 4-coordinate geometry to two equivalent O(1), two equivalent O(4), and four equivalent I(1) atoms. In the seventh Bi site, Bi(7) is bonded in a 4-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent I(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted trigonal pyramidal geometry to two equivalent O(1) and two equivalent O(3) atoms. In the second Te site, Te(2) is bonded in a distorted square pyramidal geometry to one O(9), two equivalent O(2), and two equivalent O(4) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded to one Bi(6), two equivalent Bi(1), and one Te(1) atom to form distorted OBi3Te tetrahedra that share corners with two equivalent O(1)Bi3Te tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(8)Bi4 tetrahedra,  an edgeedge with one O(5)Bi4 tetrahedra, and edges with two equivalent O(3)Bi3Te tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Bi(7), two equivalent Bi(1), and one Te(2) atom. In the third O site, O(3) is bonded to one Bi(7), two equivalent Bi(1), and one Te(1) atom to form distorted OBi3Te tetrahedra that share corners with two equivalent O(3)Bi3Te tetrahedra, corners with two equivalent O(5)Bi4 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra,  an edgeedge with one O(8)Bi4 tetrahedra, and edges with two equivalent O(1)Bi3Te tetrahedra. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Bi(6), two equivalent Bi(1), and one Te(2) atom. In the fifth O site, O(5) is bonded to one Bi(2), one Bi(4), and two equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with two equivalent O(3)Bi3Te tetrahedra, corners with two equivalent O(5)Bi4 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra,  an edgeedge with one O(1)Bi3Te tetrahedra, edges with two equivalent O(7)Bi4 tetrahedra, and edges with two equivalent O(8)Bi4 tetrahedra. In the sixth O site, O(6) is bonded to one Bi(3), one Bi(5), and two equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with two equivalent O(1)Bi3Te tetrahedra, corners with two equivalent O(3)Bi3Te tetrahedra, corners with two equivalent O(5)Bi4 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, edges with two equivalent O(7)Bi4 tetrahedra, and edges with two equivalent O(8)Bi4 tetrahedra. In the seventh O site, O(7) is bonded to one Bi(2), one Bi(3), and two equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with two equivalent O(1)Bi3Te tetrahedra, corners with two equivalent O(3)Bi3Te tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(8)Bi4 tetrahedra, edges with two equivalent O(5)Bi4 tetrahedra, and edges with two equivalent O(6)Bi4 tetrahedra. In the eighth O site, O(8) is bonded to one Bi(4), one Bi(5), and two equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with two equivalent O(1)Bi3Te tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(8)Bi4 tetrahedra,  an edgeedge with one O(3)Bi3Te tetrahedra, edges with two equivalent O(5)Bi4 tetrahedra, and edges with two equivalent O(6)Bi4 tetrahedra. In the ninth O site, O(9) is bonded in a single-bond geometry to four equivalent Bi(1) and one Te(2) atom. I(1) is bonded in a 6-coordinate geometry to one Bi(2), one Bi(3), one Bi(4), one Bi(5), one Bi(6), and one Bi(7) atom. is represented by the CIF file [CIF]
data_Bi10Te2I4O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.663
_cell_length_b   10.663
_cell_length_c   7.990
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   136.000
_symmetry_Int_Tables_number   1
_cell_volume   631.099
_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
  Bi  Bi0  1  0.490  0.997  0.757  1.0
  Bi  Bi1  1  0.490  0.997  0.243  1.0
  Bi  Bi2  1  0.003  0.510  0.757  1.0
  Bi  Bi3  1  0.003  0.510  0.243  1.0
  Bi  Bi4  1  0.377  0.623  0.500  1.0
  Bi  Bi5  1  0.370  0.630  0.000  1.0
  Bi  Bi6  1  0.870  0.130  0.500  1.0
  Bi  Bi7  1  0.877  0.123  0.000  1.0
  Bi  Bi8  1  0.103  0.897  0.500  1.0
  Bi  Bi9  1  0.603  0.397  0.000  1.0
  Te  Te10  1  0.622  0.378  0.500  1.0
  Te  Te11  1  0.138  0.862  0.000  1.0
  I  I12  1  0.237  0.263  0.751  1.0
  I  I13  1  0.237  0.263  0.249  1.0
  I  I14  1  0.737  0.763  0.751  1.0
  I  I15  1  0.737  0.763  0.249  1.0
  O  O16  1  0.897  0.573  0.500  1.0
  O  O17  1  0.897  0.576  0.000  1.0
  O  O18  1  0.427  0.103  0.500  1.0
  O  O19  1  0.424  0.103  0.000  1.0
  O  O20  1  0.663  0.337  0.734  1.0
  O  O21  1  0.663  0.337  0.266  1.0
  O  O22  1  0.161  0.839  0.736  1.0
  O  O23  1  0.161  0.839  0.264  1.0
  O  O24  1  0.564  0.933  0.500  1.0
  O  O25  1  0.578  0.938  0.000  1.0
  O  O26  1  0.067  0.436  0.500  1.0
  O  O27  1  0.062  0.422  0.000  1.0
  O  O28  1  0.320  0.680  0.742  1.0
  O  O29  1  0.320  0.680  0.258  1.0
  O  O30  1  0.815  0.185  0.752  1.0
  O  O31  1  0.815  0.185  0.248  1.0
  O  O32  1  0.234  0.766  0.000  1.0
[/CIF]
.