The material structure described by Sr8Cu8O17 crystallizes in the monoclinic C2/m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a distorted q6 geometry to one O(1), one O(4), one O(5), one O(6), one O(7), two equivalent O(2), and two equivalent O(3) atoms. In the third Sr site, Sr(3) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(6), and two equivalent O(3) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(4), one O(6), and two equivalent O(2) atoms. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(1), one O(7), and two equivalent O(2) atoms. In the fourth Cu site, Cu(4) is bonded to one O(4), one O(5), one O(7), and two equivalent O(3) atoms to form corner-sharing CuO5 square pyramids. There are seven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Cu(1), and one Cu(3) atom to form a mixture of edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 1-68°. In the second O site, O(2) is bonded to one Sr(1), one Sr(3), two equivalent Sr(2), one Cu(2), and one Cu(3) atom to form a mixture of edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the third O site, O(3) is bonded to one Sr(1), one Sr(3), two equivalent Sr(2), one Cu(1), and one Cu(4) atom to form a mixture of distorted edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Cu(2), and one Cu(4) atom to form a mixture of distorted edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the fifth O site, O(5) is bonded to four equivalent Sr(2) and two equivalent Cu(4) atoms to form a mixture of distorted corner and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. In the sixth O site, O(6) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Cu(1), and one Cu(2) atom to form a mixture of edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the seventh O site, O(7) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. is represented by the CIF card [CIF]
data_Sr8Cu8O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.803
_cell_length_b   8.803
_cell_length_c   8.119
_cell_angle_alpha   64.261
_cell_angle_beta   64.261
_cell_angle_gamma   52.806
_symmetry_Int_Tables_number   1
_cell_volume   438.273
_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
  Sr  Sr0  1  0.251  0.749  0.000  1.0
  Sr  Sr1  1  0.359  0.881  0.500  1.0
  Sr  Sr2  1  0.000  0.500  0.000  1.0
  Sr  Sr3  1  0.749  0.251  0.000  1.0
  Sr  Sr4  1  0.119  0.641  0.500  1.0
  Sr  Sr5  1  0.881  0.359  0.500  1.0
  Sr  Sr6  1  0.641  0.119  0.500  1.0
  Sr  Sr7  1  0.500  0.000  0.000  1.0
  Cu  Cu8  1  0.435  0.435  0.759  1.0
  Cu  Cu9  1  0.189  0.189  0.755  1.0
  Cu  Cu10  1  0.316  0.316  0.246  1.0
  Cu  Cu11  1  0.065  0.065  0.238  1.0
  Cu  Cu12  1  0.935  0.935  0.762  1.0
  Cu  Cu13  1  0.811  0.811  0.245  1.0
  Cu  Cu14  1  0.684  0.684  0.754  1.0
  Cu  Cu15  1  0.565  0.565  0.241  1.0
  O  O16  1  0.438  0.438  0.253  1.0
  O  O17  1  0.439  0.939  0.745  1.0
  O  O18  1  0.322  0.813  0.230  1.0
  O  O19  1  0.187  0.678  0.770  1.0
  O  O20  1  0.065  0.065  0.766  1.0
  O  O21  1  0.000  0.000  0.500  1.0
  O  O22  1  0.935  0.935  0.234  1.0
  O  O23  1  0.315  0.315  0.745  1.0
  O  O24  1  0.198  0.198  0.234  1.0
  O  O25  1  0.061  0.561  0.255  1.0
  O  O26  1  0.813  0.322  0.230  1.0
  O  O27  1  0.678  0.187  0.770  1.0
  O  O28  1  0.939  0.439  0.745  1.0
  O  O29  1  0.685  0.685  0.255  1.0
  O  O30  1  0.562  0.562  0.747  1.0
  O  O31  1  0.802  0.802  0.766  1.0
  O  O32  1  0.561  0.061  0.255  1.0
[/CIF]
.
The material structure described by Sr8Cu8O17 crystallizes in the monoclinic C2/m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a distorted q6 geometry to one O(1), one O(4), one O(5), one O(6), one O(7), two equivalent O(2), and two equivalent O(3) atoms. In the third Sr site, Sr(3) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(6), and two equivalent O(3) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(4), one O(6), and two equivalent O(2) atoms. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to one O(1), one O(7), and two equivalent O(2) atoms. In the fourth Cu site, Cu(4) is bonded to one O(4), one O(5), one O(7), and two equivalent O(3) atoms to form corner-sharing CuO5 square pyramids. There are seven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Cu(1), and one Cu(3) atom to form a mixture of edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 1-68°. In the second O site, O(2) is bonded to one Sr(1), one Sr(3), two equivalent Sr(2), one Cu(2), and one Cu(3) atom to form a mixture of edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the third O site, O(3) is bonded to one Sr(1), one Sr(3), two equivalent Sr(2), one Cu(1), and one Cu(4) atom to form a mixture of distorted edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Cu(2), and one Cu(4) atom to form a mixture of distorted edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the fifth O site, O(5) is bonded to four equivalent Sr(2) and two equivalent Cu(4) atoms to form a mixture of distorted corner and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. In the sixth O site, O(6) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Cu(1), and one Cu(2) atom to form a mixture of edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. In the seventh O site, O(7) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Cu(3), and one Cu(4) atom to form a mixture of distorted edge, corner, and face-sharing OSr4Cu2 octahedra. The corner-sharing octahedral tilt angles range from 0-68°. is represented by the CIF card [CIF]
data_Sr8Cu8O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.803
_cell_length_b   8.803
_cell_length_c   8.119
_cell_angle_alpha   64.261
_cell_angle_beta   64.261
_cell_angle_gamma   52.806
_symmetry_Int_Tables_number   1
_cell_volume   438.273
_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
  Sr  Sr0  1  0.251  0.749  0.000  1.0
  Sr  Sr1  1  0.359  0.881  0.500  1.0
  Sr  Sr2  1  0.000  0.500  0.000  1.0
  Sr  Sr3  1  0.749  0.251  0.000  1.0
  Sr  Sr4  1  0.119  0.641  0.500  1.0
  Sr  Sr5  1  0.881  0.359  0.500  1.0
  Sr  Sr6  1  0.641  0.119  0.500  1.0
  Sr  Sr7  1  0.500  0.000  0.000  1.0
  Cu  Cu8  1  0.435  0.435  0.759  1.0
  Cu  Cu9  1  0.189  0.189  0.755  1.0
  Cu  Cu10  1  0.316  0.316  0.246  1.0
  Cu  Cu11  1  0.065  0.065  0.238  1.0
  Cu  Cu12  1  0.935  0.935  0.762  1.0
  Cu  Cu13  1  0.811  0.811  0.245  1.0
  Cu  Cu14  1  0.684  0.684  0.754  1.0
  Cu  Cu15  1  0.565  0.565  0.241  1.0
  O  O16  1  0.438  0.438  0.253  1.0
  O  O17  1  0.439  0.939  0.745  1.0
  O  O18  1  0.322  0.813  0.230  1.0
  O  O19  1  0.187  0.678  0.770  1.0
  O  O20  1  0.065  0.065  0.766  1.0
  O  O21  1  0.000  0.000  0.500  1.0
  O  O22  1  0.935  0.935  0.234  1.0
  O  O23  1  0.315  0.315  0.745  1.0
  O  O24  1  0.198  0.198  0.234  1.0
  O  O25  1  0.061  0.561  0.255  1.0
  O  O26  1  0.813  0.322  0.230  1.0
  O  O27  1  0.678  0.187  0.770  1.0
  O  O28  1  0.939  0.439  0.745  1.0
  O  O29  1  0.685  0.685  0.255  1.0
  O  O30  1  0.562  0.562  0.747  1.0
  O  O31  1  0.802  0.802  0.766  1.0
  O  O32  1  0.561  0.061  0.255  1.0
[/CIF]
.