The compound described by Sr2YSn2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three 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. Sn(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 Sn(1) atoms to form a mixture of corner and edge-sharing OY2Sn2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Y(1) and two equivalent Sn(1) atoms to form a mixture of corner and edge-sharing OY2Sn2 tetrahedra. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent Sr(1) and one Sn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2YSn2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.402
_cell_length_b   14.402
_cell_length_c   14.402
_cell_angle_alpha   158.029
_cell_angle_beta   157.221
_cell_angle_gamma   31.856
_symmetry_Int_Tables_number   1
_cell_volume   432.384
_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  0.811  0.724  0.914  1.0
  Sr  Sr1  1  0.190  0.276  0.087  1.0
  Sr  Sr2  1  0.690  0.603  0.914  1.0
  Sr  Sr3  1  0.311  0.397  0.087  1.0
  Y  Y4  1  0.517  0.500  0.017  1.0
  Y  Y5  1  0.017  0.000  0.017  1.0
  Sn  Sn6  1  0.437  0.922  0.520  1.0
  Sn  Sn7  1  0.598  0.078  0.515  1.0
  Sn  Sn8  1  0.098  0.583  0.520  1.0
  Sn  Sn9  1  0.937  0.417  0.515  1.0
  O  O10  1  0.006  0.512  0.019  1.0
  O  O11  1  0.506  0.488  0.494  1.0
  O  O12  1  0.216  0.199  0.516  1.0
  O  O13  1  0.317  0.801  0.017  1.0
  O  O14  1  0.817  0.800  0.516  1.0
  O  O15  1  0.716  0.200  0.017  1.0
  O  O16  1  0.717  0.699  0.519  1.0
  O  O17  1  0.820  0.301  0.018  1.0
  O  O18  1  0.320  0.302  0.519  1.0
  O  O19  1  0.217  0.698  0.018  1.0
  O  O20  1  0.871  0.354  0.528  1.0
  O  O21  1  0.175  0.646  0.517  1.0
  O  O22  1  0.675  0.157  0.528  1.0
  O  O23  1  0.371  0.843  0.517  1.0
[/CIF]
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The compound described by Sr2YSn2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three 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. Sn(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 Sn(1) atoms to form a mixture of corner and edge-sharing OY2Sn2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Y(1) and two equivalent Sn(1) atoms to form a mixture of corner and edge-sharing OY2Sn2 tetrahedra. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent Sr(1) and one Sn(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2YSn2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.402
_cell_length_b   14.402
_cell_length_c   14.402
_cell_angle_alpha   158.029
_cell_angle_beta   157.221
_cell_angle_gamma   31.856
_symmetry_Int_Tables_number   1
_cell_volume   432.384
_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  0.811  0.724  0.914  1.0
  Sr  Sr1  1  0.190  0.276  0.087  1.0
  Sr  Sr2  1  0.690  0.603  0.914  1.0
  Sr  Sr3  1  0.311  0.397  0.087  1.0
  Y  Y4  1  0.517  0.500  0.017  1.0
  Y  Y5  1  0.017  0.000  0.017  1.0
  Sn  Sn6  1  0.437  0.922  0.520  1.0
  Sn  Sn7  1  0.598  0.078  0.515  1.0
  Sn  Sn8  1  0.098  0.583  0.520  1.0
  Sn  Sn9  1  0.937  0.417  0.515  1.0
  O  O10  1  0.006  0.512  0.019  1.0
  O  O11  1  0.506  0.488  0.494  1.0
  O  O12  1  0.216  0.199  0.516  1.0
  O  O13  1  0.317  0.801  0.017  1.0
  O  O14  1  0.817  0.800  0.516  1.0
  O  O15  1  0.716  0.200  0.017  1.0
  O  O16  1  0.717  0.699  0.519  1.0
  O  O17  1  0.820  0.301  0.018  1.0
  O  O18  1  0.320  0.302  0.519  1.0
  O  O19  1  0.217  0.698  0.018  1.0
  O  O20  1  0.871  0.354  0.528  1.0
  O  O21  1  0.175  0.646  0.517  1.0
  O  O22  1  0.675  0.157  0.528  1.0
  O  O23  1  0.371  0.843  0.517  1.0
[/CIF]
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