The structure described by Sr2Co2TlAlO7 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(7), two equivalent O(1), two equivalent O(2), and four equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(7), two equivalent O(3), two equivalent O(4), and four equivalent O(6) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(5), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing CoO5 square pyramids. In the second Co site, Co(2) is bonded to one O(6), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing CoO5 square pyramids. Tl(1) is bonded in a see-saw-like geometry to one O(5), one O(6), and two equivalent O(7) atoms. Al(1) is bonded in a square co-planar geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1), two equivalent Co(1), and one Al(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Sr(1), two equivalent Co(1), and one Al(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Sr(2), two equivalent Co(2), and one Al(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Sr(2), two equivalent Co(2), and one Al(1) atom. In the fifth O site, O(5) is bonded to four equivalent Sr(1), one Co(1), and one Tl(1) atom to form a mixture of distorted edge and corner-sharing OSr4TlCo octahedra. The corner-sharing octahedral tilt angles are 15°. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to four equivalent Sr(2), one Co(2), and one Tl(1) atom. In the seventh O site, O(7) is bonded in a see-saw-like geometry to one Sr(1), one Sr(2), and two equivalent Tl(1) atoms. is represented by the CIF card [CIF]
data_Sr2AlTlCo2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.895
_cell_length_b   3.929
_cell_length_c   11.612
_cell_angle_alpha   85.737
_cell_angle_beta   94.551
_cell_angle_gamma   93.078
_symmetry_Int_Tables_number   1
_cell_volume   176.453
_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  0.439  0.551  0.782  1.0
  Sr  Sr1  1  0.569  0.428  0.218  1.0
  Al  Al2  1  0.501  0.498  0.500  1.0
  Tl  Tl3  1  0.018  0.921  0.001  1.0
  Co  Co4  1  0.916  0.076  0.630  1.0
  Co  Co5  1  0.085  0.918  0.369  1.0
  O  O6  1  0.408  0.128  0.604  1.0
  O  O7  1  0.868  0.589  0.607  1.0
  O  O8  1  0.595  0.864  0.394  1.0
  O  O9  1  0.132  0.407  0.393  1.0
  O  O10  1  0.956  0.054  0.814  1.0
  O  O11  1  0.027  0.991  0.186  1.0
  O  O12  1  0.487  0.575  0.001  1.0
[/CIF]
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The structure described by Sr2Co2TlAlO7 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(7), two equivalent O(1), two equivalent O(2), and four equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(7), two equivalent O(3), two equivalent O(4), and four equivalent O(6) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(5), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing CoO5 square pyramids. In the second Co site, Co(2) is bonded to one O(6), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing CoO5 square pyramids. Tl(1) is bonded in a see-saw-like geometry to one O(5), one O(6), and two equivalent O(7) atoms. Al(1) is bonded in a square co-planar geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1), two equivalent Co(1), and one Al(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Sr(1), two equivalent Co(1), and one Al(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Sr(2), two equivalent Co(2), and one Al(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Sr(2), two equivalent Co(2), and one Al(1) atom. In the fifth O site, O(5) is bonded to four equivalent Sr(1), one Co(1), and one Tl(1) atom to form a mixture of distorted edge and corner-sharing OSr4TlCo octahedra. The corner-sharing octahedral tilt angles are 15°. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to four equivalent Sr(2), one Co(2), and one Tl(1) atom. In the seventh O site, O(7) is bonded in a see-saw-like geometry to one Sr(1), one Sr(2), and two equivalent Tl(1) atoms. is represented by the CIF card [CIF]
data_Sr2AlTlCo2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.895
_cell_length_b   3.929
_cell_length_c   11.612
_cell_angle_alpha   85.737
_cell_angle_beta   94.551
_cell_angle_gamma   93.078
_symmetry_Int_Tables_number   1
_cell_volume   176.453
_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  0.439  0.551  0.782  1.0
  Sr  Sr1  1  0.569  0.428  0.218  1.0
  Al  Al2  1  0.501  0.498  0.500  1.0
  Tl  Tl3  1  0.018  0.921  0.001  1.0
  Co  Co4  1  0.916  0.076  0.630  1.0
  Co  Co5  1  0.085  0.918  0.369  1.0
  O  O6  1  0.408  0.128  0.604  1.0
  O  O7  1  0.868  0.589  0.607  1.0
  O  O8  1  0.595  0.864  0.394  1.0
  O  O9  1  0.132  0.407  0.393  1.0
  O  O10  1  0.956  0.054  0.814  1.0
  O  O11  1  0.027  0.991  0.186  1.0
  O  O12  1  0.487  0.575  0.001  1.0
[/CIF]
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