The material described by Sr8Co4Fe4O23 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted q6 geometry to one O(5), two equivalent O(2), four equivalent O(1), and four equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded to one O(4), one O(5), two equivalent O(2), four equivalent O(1), and four equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with six equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Co(2)O6 octahedra, faces with four equivalent Fe(1)O6 octahedra, and faces with two equivalent Co(1)O5 square pyramids. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Co(1)O5 square pyramids, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-11°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(4) and four equivalent O(1) atoms to form CoO5 square pyramids that share corners with four equivalent Fe(1)O6 octahedra,  a cornercorner with one Co(1)O5 square pyramid, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 15°. In the second Co site, Co(2) is bonded to two equivalent O(5) and four equivalent O(3) atoms to form CoO6 octahedra that share corners with two equivalent Co(2)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Fe(1), and one Co(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Fe(1), and one Co(2) atom to form distorted OSr4FeCo octahedra that share corners with six equivalent O(3)Sr4FeCo octahedra, edges with two equivalent O(3)Sr4FeCo octahedra, faces with two equivalent O(5)Sr4Co2 octahedra, and faces with two equivalent O(3)Sr4FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Sr(2) and two equivalent Co(1) atoms. In the fifth O site, O(5) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Co(2) atoms to form distorted OSr4Co2 octahedra that share corners with two equivalent O(5)Sr4Co2 octahedra and faces with eight equivalent O(3)Sr4FeCo octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF card [CIF]
data_Sr8Fe4Co4O23
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.732
_cell_length_b   8.732
_cell_length_c   8.732
_cell_angle_alpha   101.386
_cell_angle_beta   101.386
_cell_angle_gamma   127.241
_symmetry_Int_Tables_number   1
_cell_volume   474.926
_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  0.000  0.258  0.258  1.0
  Sr  Sr1  1  0.000  0.742  0.742  1.0
  Sr  Sr2  1  0.742  0.000  0.742  1.0
  Sr  Sr3  1  0.258  0.000  0.258  1.0
  Sr  Sr4  1  0.500  0.754  0.254  1.0
  Sr  Sr5  1  0.500  0.246  0.746  1.0
  Sr  Sr6  1  0.246  0.500  0.746  1.0
  Sr  Sr7  1  0.754  0.500  0.254  1.0
  Fe  Fe8  1  0.000  0.000  0.500  1.0
  Fe  Fe9  1  0.500  0.500  0.500  1.0
  Fe  Fe10  1  0.500  0.000  0.000  1.0
  Fe  Fe11  1  0.000  0.500  0.000  1.0
  Co  Co12  1  0.741  0.741  0.000  1.0
  Co  Co13  1  0.259  0.259  0.000  1.0
  Co  Co14  1  0.750  0.250  0.500  1.0
  Co  Co15  1  0.250  0.750  0.500  1.0
  O  O16  1  0.895  0.895  0.235  1.0
  O  O17  1  0.660  0.660  0.765  1.0
  O  O18  1  0.660  0.895  0.000  1.0
  O  O19  1  0.895  0.660  0.000  1.0
  O  O20  1  0.105  0.105  0.765  1.0
  O  O21  1  0.340  0.340  0.235  1.0
  O  O22  1  0.340  0.105  0.000  1.0
  O  O23  1  0.105  0.340  0.000  1.0
  O  O24  1  0.738  0.738  0.476  1.0
  O  O25  1  0.262  0.262  0.524  1.0
  O  O26  1  0.262  0.738  0.000  1.0
  O  O27  1  0.738  0.262  0.000  1.0
  O  O28  1  0.374  0.874  0.747  1.0
  O  O29  1  0.126  0.626  0.253  1.0
  O  O30  1  0.126  0.874  0.500  1.0
  O  O31  1  0.374  0.626  0.500  1.0
  O  O32  1  0.626  0.374  0.500  1.0
  O  O33  1  0.874  0.126  0.500  1.0
  O  O34  1  0.874  0.374  0.747  1.0
  O  O35  1  0.626  0.126  0.253  1.0
  O  O36  1  0.500  0.500  0.000  1.0
  O  O37  1  0.000  0.500  0.500  1.0
  O  O38  1  0.500  0.000  0.500  1.0
[/CIF]
.
The material described by Sr8Co4Fe4O23 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted q6 geometry to one O(5), two equivalent O(2), four equivalent O(1), and four equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded to one O(4), one O(5), two equivalent O(2), four equivalent O(1), and four equivalent O(3) atoms to form SrO12 cuboctahedra that share corners with six equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Co(2)O6 octahedra, faces with four equivalent Fe(1)O6 octahedra, and faces with two equivalent Co(1)O5 square pyramids. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Co(1)O5 square pyramids, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-11°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(4) and four equivalent O(1) atoms to form CoO5 square pyramids that share corners with four equivalent Fe(1)O6 octahedra,  a cornercorner with one Co(1)O5 square pyramid, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 15°. In the second Co site, Co(2) is bonded to two equivalent O(5) and four equivalent O(3) atoms to form CoO6 octahedra that share corners with two equivalent Co(2)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Fe(1), and one Co(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Fe(1), and one Co(2) atom to form distorted OSr4FeCo octahedra that share corners with six equivalent O(3)Sr4FeCo octahedra, edges with two equivalent O(3)Sr4FeCo octahedra, faces with two equivalent O(5)Sr4Co2 octahedra, and faces with two equivalent O(3)Sr4FeCo octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Sr(2) and two equivalent Co(1) atoms. In the fifth O site, O(5) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Co(2) atoms to form distorted OSr4Co2 octahedra that share corners with two equivalent O(5)Sr4Co2 octahedra and faces with eight equivalent O(3)Sr4FeCo octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF card [CIF]
data_Sr8Fe4Co4O23
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.732
_cell_length_b   8.732
_cell_length_c   8.732
_cell_angle_alpha   101.386
_cell_angle_beta   101.386
_cell_angle_gamma   127.241
_symmetry_Int_Tables_number   1
_cell_volume   474.926
_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  0.000  0.258  0.258  1.0
  Sr  Sr1  1  0.000  0.742  0.742  1.0
  Sr  Sr2  1  0.742  0.000  0.742  1.0
  Sr  Sr3  1  0.258  0.000  0.258  1.0
  Sr  Sr4  1  0.500  0.754  0.254  1.0
  Sr  Sr5  1  0.500  0.246  0.746  1.0
  Sr  Sr6  1  0.246  0.500  0.746  1.0
  Sr  Sr7  1  0.754  0.500  0.254  1.0
  Fe  Fe8  1  0.000  0.000  0.500  1.0
  Fe  Fe9  1  0.500  0.500  0.500  1.0
  Fe  Fe10  1  0.500  0.000  0.000  1.0
  Fe  Fe11  1  0.000  0.500  0.000  1.0
  Co  Co12  1  0.741  0.741  0.000  1.0
  Co  Co13  1  0.259  0.259  0.000  1.0
  Co  Co14  1  0.750  0.250  0.500  1.0
  Co  Co15  1  0.250  0.750  0.500  1.0
  O  O16  1  0.895  0.895  0.235  1.0
  O  O17  1  0.660  0.660  0.765  1.0
  O  O18  1  0.660  0.895  0.000  1.0
  O  O19  1  0.895  0.660  0.000  1.0
  O  O20  1  0.105  0.105  0.765  1.0
  O  O21  1  0.340  0.340  0.235  1.0
  O  O22  1  0.340  0.105  0.000  1.0
  O  O23  1  0.105  0.340  0.000  1.0
  O  O24  1  0.738  0.738  0.476  1.0
  O  O25  1  0.262  0.262  0.524  1.0
  O  O26  1  0.262  0.738  0.000  1.0
  O  O27  1  0.738  0.262  0.000  1.0
  O  O28  1  0.374  0.874  0.747  1.0
  O  O29  1  0.126  0.626  0.253  1.0
  O  O30  1  0.126  0.874  0.500  1.0
  O  O31  1  0.374  0.626  0.500  1.0
  O  O32  1  0.626  0.374  0.500  1.0
  O  O33  1  0.874  0.126  0.500  1.0
  O  O34  1  0.874  0.374  0.747  1.0
  O  O35  1  0.626  0.126  0.253  1.0
  O  O36  1  0.500  0.500  0.000  1.0
  O  O37  1  0.000  0.500  0.500  1.0
  O  O38  1  0.500  0.000  0.500  1.0
[/CIF]
.