The structure described by Sr2Y2Mn2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 4-coordinate geometry to two equivalent O(3) and four equivalent O(2) atoms. In the second Y site, Y(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form YO4 tetrahedra that share corners with two equivalent Y(2)O4 tetrahedra and corners with two equivalent Mn(1)O5 trigonal bipyramids. Mn(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form MnO5 trigonal bipyramids that share  a cornercorner with one Y(2)O4 tetrahedra and corners with four equivalent Mn(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Y(2), and one Mn(1) atom. In the second O site, O(1) is bonded to two equivalent Sr(1) and two equivalent Y(2) atoms to form distorted corner-sharing OSr2Y2 tetrahedra. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Y(1), and two equivalent Mn(1) atoms. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Y(1), and two equivalent Mn(1) atoms. is represented by the CIF card [CIF]
data_Sr2Y2Mn2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.623
_cell_length_b   12.623
_cell_length_c   12.623
_cell_angle_alpha   153.519
_cell_angle_beta   152.862
_cell_angle_gamma   38.280
_symmetry_Int_Tables_number   1
_cell_volume   408.396
_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  0.320  0.851  0.459  1.0
  Sr  Sr1  1  0.680  0.140  0.532  1.0
  Sr  Sr2  1  0.108  0.640  0.459  1.0
  Sr  Sr3  1  0.892  0.351  0.532  1.0
  Y  Y4  1  0.000  0.475  0.475  1.0
  Y  Y5  1  0.500  0.975  0.475  1.0
  Y  Y6  1  0.691  0.777  0.969  1.0
  Y  Y7  1  0.309  0.277  0.086  1.0
  Mn  Mn8  1  0.428  0.396  0.979  1.0
  Mn  Mn9  1  0.572  0.551  0.967  1.0
  Mn  Mn10  1  0.083  0.051  0.979  1.0
  Mn  Mn11  1  0.917  0.896  0.967  1.0
  O  O12  1  0.344  0.655  0.499  1.0
  O  O13  1  0.656  0.155  0.312  1.0
  O  O14  1  0.238  0.703  0.063  1.0
  O  O15  1  0.762  0.825  0.465  1.0
  O  O16  1  0.860  0.325  0.063  1.0
  O  O17  1  0.140  0.203  0.465  1.0
  O  O18  1  0.628  0.100  0.860  1.0
  O  O19  1  0.372  0.232  0.472  1.0
  O  O20  1  0.260  0.732  0.860  1.0
  O  O21  1  0.740  0.600  0.472  1.0
  O  O22  1  0.889  0.770  0.994  1.0
  O  O23  1  0.111  0.105  0.880  1.0
  O  O24  1  0.725  0.605  0.994  1.0
  O  O25  1  0.275  0.270  0.880  1.0
[/CIF]
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The structure described by Sr2Y2Mn2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 4-coordinate geometry to two equivalent O(3) and four equivalent O(2) atoms. In the second Y site, Y(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form YO4 tetrahedra that share corners with two equivalent Y(2)O4 tetrahedra and corners with two equivalent Mn(1)O5 trigonal bipyramids. Mn(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form MnO5 trigonal bipyramids that share  a cornercorner with one Y(2)O4 tetrahedra and corners with four equivalent Mn(1)O5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Y(2), and one Mn(1) atom. In the second O site, O(1) is bonded to two equivalent Sr(1) and two equivalent Y(2) atoms to form distorted corner-sharing OSr2Y2 tetrahedra. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Y(1), and two equivalent Mn(1) atoms. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), one Y(1), and two equivalent Mn(1) atoms. is represented by the CIF card [CIF]
data_Sr2Y2Mn2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.623
_cell_length_b   12.623
_cell_length_c   12.623
_cell_angle_alpha   153.519
_cell_angle_beta   152.862
_cell_angle_gamma   38.280
_symmetry_Int_Tables_number   1
_cell_volume   408.396
_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  0.320  0.851  0.459  1.0
  Sr  Sr1  1  0.680  0.140  0.532  1.0
  Sr  Sr2  1  0.108  0.640  0.459  1.0
  Sr  Sr3  1  0.892  0.351  0.532  1.0
  Y  Y4  1  0.000  0.475  0.475  1.0
  Y  Y5  1  0.500  0.975  0.475  1.0
  Y  Y6  1  0.691  0.777  0.969  1.0
  Y  Y7  1  0.309  0.277  0.086  1.0
  Mn  Mn8  1  0.428  0.396  0.979  1.0
  Mn  Mn9  1  0.572  0.551  0.967  1.0
  Mn  Mn10  1  0.083  0.051  0.979  1.0
  Mn  Mn11  1  0.917  0.896  0.967  1.0
  O  O12  1  0.344  0.655  0.499  1.0
  O  O13  1  0.656  0.155  0.312  1.0
  O  O14  1  0.238  0.703  0.063  1.0
  O  O15  1  0.762  0.825  0.465  1.0
  O  O16  1  0.860  0.325  0.063  1.0
  O  O17  1  0.140  0.203  0.465  1.0
  O  O18  1  0.628  0.100  0.860  1.0
  O  O19  1  0.372  0.232  0.472  1.0
  O  O20  1  0.260  0.732  0.860  1.0
  O  O21  1  0.740  0.600  0.472  1.0
  O  O22  1  0.889  0.770  0.994  1.0
  O  O23  1  0.111  0.105  0.880  1.0
  O  O24  1  0.725  0.605  0.994  1.0
  O  O25  1  0.275  0.270  0.880  1.0
[/CIF]
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