The material described by Sr2YBi2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a distorted see-saw-like geometry to two equivalent O(1) and two equivalent O(4) atoms. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. Bi(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(2), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to four equivalent Sr(1) atoms. In the second O site, O(2) is bonded to two equivalent Y(1) and two equivalent Bi(1) atoms to form a mixture of edge and corner-sharing OY2Bi2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Y(1) and two equivalent Bi(1) atoms to form a mixture of edge and corner-sharing OY2Bi2 tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one Bi(1) atom. is represented by the CIF file [CIF]
data_Sr2YBi2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.449
_cell_length_b   15.449
_cell_length_c   15.449
_cell_angle_alpha   30.461
_cell_angle_beta   158.914
_cell_angle_gamma   158.269
_symmetry_Int_Tables_number   1
_cell_volume   490.807
_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  0.871  0.780  0.708  1.0
  Sr  Sr1  1  0.072  0.163  0.292  1.0
  Sr  Sr2  1  0.871  0.663  0.591  1.0
  Sr  Sr3  1  0.072  0.280  0.409  1.0
  Y  Y4  1  0.004  0.504  0.500  1.0
  Y  Y5  1  0.004  0.004  0.000  1.0
  Bi  Bi6  1  0.512  0.433  0.918  1.0
  Bi  Bi7  1  0.515  0.595  0.082  1.0
  Bi  Bi8  1  0.512  0.095  0.579  1.0
  Bi  Bi9  1  0.515  0.933  0.421  1.0
  O  O10  1  0.038  0.998  0.540  1.0
  O  O11  1  0.458  0.498  0.460  1.0
  O  O12  1  0.494  0.200  0.204  1.0
  O  O13  1  0.995  0.289  0.796  1.0
  O  O14  1  0.494  0.789  0.794  1.0
  O  O15  1  0.995  0.700  0.206  1.0
  O  O16  1  0.512  0.710  0.710  1.0
  O  O17  1  1.000  0.802  0.290  1.0
  O  O18  1  0.512  0.302  0.302  1.0
  O  O19  1  1.000  0.210  0.698  1.0
  O  O20  1  0.650  0.948  0.397  1.0
  O  O21  1  0.550  0.253  0.603  1.0
  O  O22  1  0.650  0.753  0.203  1.0
  O  O23  1  0.550  0.448  0.797  1.0
[/CIF]
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The material described by Sr2YBi2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a distorted see-saw-like geometry to two equivalent O(1) and two equivalent O(4) atoms. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. Bi(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(2), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to four equivalent Sr(1) atoms. In the second O site, O(2) is bonded to two equivalent Y(1) and two equivalent Bi(1) atoms to form a mixture of edge and corner-sharing OY2Bi2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Y(1) and two equivalent Bi(1) atoms to form a mixture of edge and corner-sharing OY2Bi2 tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one Bi(1) atom. is represented by the CIF file [CIF]
data_Sr2YBi2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.449
_cell_length_b   15.449
_cell_length_c   15.449
_cell_angle_alpha   30.461
_cell_angle_beta   158.914
_cell_angle_gamma   158.269
_symmetry_Int_Tables_number   1
_cell_volume   490.807
_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  0.871  0.780  0.708  1.0
  Sr  Sr1  1  0.072  0.163  0.292  1.0
  Sr  Sr2  1  0.871  0.663  0.591  1.0
  Sr  Sr3  1  0.072  0.280  0.409  1.0
  Y  Y4  1  0.004  0.504  0.500  1.0
  Y  Y5  1  0.004  0.004  0.000  1.0
  Bi  Bi6  1  0.512  0.433  0.918  1.0
  Bi  Bi7  1  0.515  0.595  0.082  1.0
  Bi  Bi8  1  0.512  0.095  0.579  1.0
  Bi  Bi9  1  0.515  0.933  0.421  1.0
  O  O10  1  0.038  0.998  0.540  1.0
  O  O11  1  0.458  0.498  0.460  1.0
  O  O12  1  0.494  0.200  0.204  1.0
  O  O13  1  0.995  0.289  0.796  1.0
  O  O14  1  0.494  0.789  0.794  1.0
  O  O15  1  0.995  0.700  0.206  1.0
  O  O16  1  0.512  0.710  0.710  1.0
  O  O17  1  1.000  0.802  0.290  1.0
  O  O18  1  0.512  0.302  0.302  1.0
  O  O19  1  1.000  0.210  0.698  1.0
  O  O20  1  0.650  0.948  0.397  1.0
  O  O21  1  0.550  0.253  0.603  1.0
  O  O22  1  0.650  0.753  0.203  1.0
  O  O23  1  0.550  0.448  0.797  1.0
[/CIF]
.