The material structure described by Sr4(Te3O8)Cl4 crystallizes in the monoclinic C2 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), two equivalent O(5), and one Cl(2) atom. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), two equivalent O(6), two equivalent O(7), two equivalent O(8), and one Cl(4) atom. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one Cl(2), one Cl(5), and two equivalent Cl(3) atoms. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(3), one O(4), one Cl(5), two equivalent Cl(3), and three equivalent Cl(1) atoms. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one O(5), one O(6), one O(7), and one O(8) atom. In the second Te site, Te(2) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(5) atom. In the third Te site, Te(3) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one Sr(3), and one Te(3) atom to form OSr3Te tetrahedra that share  a cornercorner with one O(6)Sr3Te tetrahedra, corners with two equivalent O(4)Sr3Te tetrahedra, corners with three equivalent O(7)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(3)Sr3Te tetrahedra,  an edgeedge with one O(6)Sr3Te tetrahedra, and edges with two equivalent O(2)Sr3Te tetrahedra. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Sr(3), and one Te(3) atom to form OSr3Te tetrahedra that share  a cornercorner with one O(7)Sr3Te tetrahedra, corners with two equivalent O(3)Sr3Te tetrahedra, corners with three equivalent O(6)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(4)Sr3Te tetrahedra,  an edgeedge with one O(7)Sr3Te tetrahedra, and edges with two equivalent O(1)Sr3Te tetrahedra. In the third O site, O(3) is bonded to one Sr(1), one Sr(3), one Sr(4), and one Te(2) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(6)Sr3Te tetrahedra,  a cornercorner with one O(7)Sr3Te tetrahedra, corners with two equivalent O(2)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(1)Sr3Te tetrahedra, edges with two equivalent O(4)Sr3Te tetrahedra, and  an edgeedge with one Cl(3)Sr4 trigonal pyramid. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(3), one Sr(4), and one Te(2) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(6)Sr3Te tetrahedra,  a cornercorner with one O(7)Sr3Te tetrahedra, corners with two equivalent O(1)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(2)Sr3Te tetrahedra, edges with two equivalent O(3)Sr3Te tetrahedra, and  an edgeedge with one Cl(3)Sr4 trigonal pyramid. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Te(1), and one Te(2) atom. In the sixth O site, O(6) is bonded to one Sr(1), two equivalent Sr(2), and one Te(1) atom to form a mixture of corner and edge-sharing OSr3Te tetrahedra. In the seventh O site, O(7) is bonded to one Sr(1), two equivalent Sr(2), and one Te(1) atom to form a mixture of corner and edge-sharing OSr3Te tetrahedra. In the eighth O site, O(8) is bonded in a distorted linear geometry to two equivalent Sr(2), one Te(1), and one Te(3) atom. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to three equivalent Sr(4) atoms. In the second Cl site, Cl(2) is bonded in a linear geometry to one Sr(1) and one Sr(3) atom. In the third Cl site, Cl(3) is bonded to two equivalent Sr(3) and two equivalent Sr(4) atoms to form ClSr4 trigonal pyramids that share corners with two equivalent O(1)Sr3Te tetrahedra, corners with two equivalent O(2)Sr3Te tetrahedra, corners with two equivalent O(3)Sr3Te tetrahedra, corners with two equivalent O(4)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(3)Sr3Te tetrahedra,  an edgeedge with one O(4)Sr3Te tetrahedra, and  an edgeedge with one Cl(3)Sr4 trigonal pyramid. In the fourth Cl site, Cl(4) is bonded in a linear geometry to two equivalent Sr(2) atoms. In the fifth Cl site, Cl(5) is bonded in a 4-coordinate geometry to two equivalent Sr(3) and two equivalent Sr(4) atoms. is represented by the CIF file [CIF]
data_Sr4Te3(ClO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.781
_cell_length_b   8.781
_cell_length_c   17.229
_cell_angle_alpha   71.781
_cell_angle_beta   71.781
_cell_angle_gamma   38.530
_symmetry_Int_Tables_number   1
_cell_volume   780.782
_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
  Sr  Sr0  1  0.738  0.739  0.699  1.0
  Sr  Sr1  1  0.261  0.262  0.301  1.0
  Sr  Sr2  1  0.158  0.158  0.559  1.0
  Sr  Sr3  1  0.842  0.842  0.441  1.0
  Sr  Sr4  1  0.048  0.051  0.819  1.0
  Sr  Sr5  1  0.949  0.952  0.181  1.0
  Sr  Sr6  1  0.650  0.637  0.956  1.0
  Sr  Sr7  1  0.363  0.350  0.044  1.0
  Te  Te8  1  0.366  0.366  0.572  1.0
  Te  Te9  1  0.634  0.634  0.428  1.0
  Te  Te10  1  0.269  0.268  0.821  1.0
  Te  Te11  1  0.732  0.731  0.179  1.0
  Te  Te12  1  0.534  0.535  0.676  1.0
  Te  Te13  1  0.465  0.466  0.324  1.0
  Cl  Cl14  1  0.809  0.805  0.982  1.0
  Cl  Cl15  1  0.195  0.191  0.018  1.0
  Cl  Cl16  1  0.900  0.901  0.746  1.0
  Cl  Cl17  1  0.099  0.100  0.254  1.0
  Cl  Cl18  1  0.500  0.521  0.123  1.0
  Cl  Cl19  1  0.479  0.500  0.877  1.0
  Cl  Cl20  1  0.000  1.000  0.500  1.0
  Cl  Cl21  1  0.951  0.049  0.000  1.0
  O  O22  1  0.844  0.361  0.694  1.0
  O  O23  1  0.361  0.844  0.693  1.0
  O  O24  1  0.156  0.639  0.307  1.0
  O  O25  1  0.639  0.156  0.306  1.0
  O  O26  1  0.948  0.428  0.833  1.0
  O  O27  1  0.427  0.948  0.834  1.0
  O  O28  1  0.052  0.573  0.166  1.0
  O  O29  1  0.572  0.052  0.167  1.0
  O  O30  1  0.299  0.299  0.703  1.0
  O  O31  1  0.701  0.701  0.297  1.0
  O  O32  1  0.050  0.534  0.569  1.0
  O  O33  1  0.534  0.050  0.568  1.0
  O  O34  1  0.950  0.466  0.432  1.0
  O  O35  1  0.466  0.950  0.431  1.0
  O  O36  1  0.591  0.591  0.559  1.0
  O  O37  1  0.409  0.409  0.441  1.0
[/CIF]
.
The material structure described by Sr4(Te3O8)Cl4 crystallizes in the monoclinic C2 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), two equivalent O(5), and one Cl(2) atom. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(2), two equivalent O(6), two equivalent O(7), two equivalent O(8), and one Cl(4) atom. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one Cl(2), one Cl(5), and two equivalent Cl(3) atoms. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(3), one O(4), one Cl(5), two equivalent Cl(3), and three equivalent Cl(1) atoms. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one O(5), one O(6), one O(7), and one O(8) atom. In the second Te site, Te(2) is bonded in a distorted T-shaped geometry to one O(3), one O(4), and one O(5) atom. In the third Te site, Te(3) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one Sr(3), and one Te(3) atom to form OSr3Te tetrahedra that share  a cornercorner with one O(6)Sr3Te tetrahedra, corners with two equivalent O(4)Sr3Te tetrahedra, corners with three equivalent O(7)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(3)Sr3Te tetrahedra,  an edgeedge with one O(6)Sr3Te tetrahedra, and edges with two equivalent O(2)Sr3Te tetrahedra. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Sr(3), and one Te(3) atom to form OSr3Te tetrahedra that share  a cornercorner with one O(7)Sr3Te tetrahedra, corners with two equivalent O(3)Sr3Te tetrahedra, corners with three equivalent O(6)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(4)Sr3Te tetrahedra,  an edgeedge with one O(7)Sr3Te tetrahedra, and edges with two equivalent O(1)Sr3Te tetrahedra. In the third O site, O(3) is bonded to one Sr(1), one Sr(3), one Sr(4), and one Te(2) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(6)Sr3Te tetrahedra,  a cornercorner with one O(7)Sr3Te tetrahedra, corners with two equivalent O(2)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(1)Sr3Te tetrahedra, edges with two equivalent O(4)Sr3Te tetrahedra, and  an edgeedge with one Cl(3)Sr4 trigonal pyramid. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(3), one Sr(4), and one Te(2) atom to form distorted OSr3Te tetrahedra that share  a cornercorner with one O(6)Sr3Te tetrahedra,  a cornercorner with one O(7)Sr3Te tetrahedra, corners with two equivalent O(1)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(2)Sr3Te tetrahedra, edges with two equivalent O(3)Sr3Te tetrahedra, and  an edgeedge with one Cl(3)Sr4 trigonal pyramid. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Te(1), and one Te(2) atom. In the sixth O site, O(6) is bonded to one Sr(1), two equivalent Sr(2), and one Te(1) atom to form a mixture of corner and edge-sharing OSr3Te tetrahedra. In the seventh O site, O(7) is bonded to one Sr(1), two equivalent Sr(2), and one Te(1) atom to form a mixture of corner and edge-sharing OSr3Te tetrahedra. In the eighth O site, O(8) is bonded in a distorted linear geometry to two equivalent Sr(2), one Te(1), and one Te(3) atom. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to three equivalent Sr(4) atoms. In the second Cl site, Cl(2) is bonded in a linear geometry to one Sr(1) and one Sr(3) atom. In the third Cl site, Cl(3) is bonded to two equivalent Sr(3) and two equivalent Sr(4) atoms to form ClSr4 trigonal pyramids that share corners with two equivalent O(1)Sr3Te tetrahedra, corners with two equivalent O(2)Sr3Te tetrahedra, corners with two equivalent O(3)Sr3Te tetrahedra, corners with two equivalent O(4)Sr3Te tetrahedra, corners with two equivalent Cl(3)Sr4 trigonal pyramids,  an edgeedge with one O(3)Sr3Te tetrahedra,  an edgeedge with one O(4)Sr3Te tetrahedra, and  an edgeedge with one Cl(3)Sr4 trigonal pyramid. In the fourth Cl site, Cl(4) is bonded in a linear geometry to two equivalent Sr(2) atoms. In the fifth Cl site, Cl(5) is bonded in a 4-coordinate geometry to two equivalent Sr(3) and two equivalent Sr(4) atoms. is represented by the CIF file [CIF]
data_Sr4Te3(ClO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.781
_cell_length_b   8.781
_cell_length_c   17.229
_cell_angle_alpha   71.781
_cell_angle_beta   71.781
_cell_angle_gamma   38.530
_symmetry_Int_Tables_number   1
_cell_volume   780.782
_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
  Sr  Sr0  1  0.738  0.739  0.699  1.0
  Sr  Sr1  1  0.261  0.262  0.301  1.0
  Sr  Sr2  1  0.158  0.158  0.559  1.0
  Sr  Sr3  1  0.842  0.842  0.441  1.0
  Sr  Sr4  1  0.048  0.051  0.819  1.0
  Sr  Sr5  1  0.949  0.952  0.181  1.0
  Sr  Sr6  1  0.650  0.637  0.956  1.0
  Sr  Sr7  1  0.363  0.350  0.044  1.0
  Te  Te8  1  0.366  0.366  0.572  1.0
  Te  Te9  1  0.634  0.634  0.428  1.0
  Te  Te10  1  0.269  0.268  0.821  1.0
  Te  Te11  1  0.732  0.731  0.179  1.0
  Te  Te12  1  0.534  0.535  0.676  1.0
  Te  Te13  1  0.465  0.466  0.324  1.0
  Cl  Cl14  1  0.809  0.805  0.982  1.0
  Cl  Cl15  1  0.195  0.191  0.018  1.0
  Cl  Cl16  1  0.900  0.901  0.746  1.0
  Cl  Cl17  1  0.099  0.100  0.254  1.0
  Cl  Cl18  1  0.500  0.521  0.123  1.0
  Cl  Cl19  1  0.479  0.500  0.877  1.0
  Cl  Cl20  1  0.000  1.000  0.500  1.0
  Cl  Cl21  1  0.951  0.049  0.000  1.0
  O  O22  1  0.844  0.361  0.694  1.0
  O  O23  1  0.361  0.844  0.693  1.0
  O  O24  1  0.156  0.639  0.307  1.0
  O  O25  1  0.639  0.156  0.306  1.0
  O  O26  1  0.948  0.428  0.833  1.0
  O  O27  1  0.427  0.948  0.834  1.0
  O  O28  1  0.052  0.573  0.166  1.0
  O  O29  1  0.572  0.052  0.167  1.0
  O  O30  1  0.299  0.299  0.703  1.0
  O  O31  1  0.701  0.701  0.297  1.0
  O  O32  1  0.050  0.534  0.569  1.0
  O  O33  1  0.534  0.050  0.568  1.0
  O  O34  1  0.950  0.466  0.432  1.0
  O  O35  1  0.466  0.950  0.431  1.0
  O  O36  1  0.591  0.591  0.559  1.0
  O  O37  1  0.409  0.409  0.441  1.0
[/CIF]
.