The material structure described by Sr2YCr2GaO7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. Y(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(4) atoms. Cr(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(4) atoms to form CrO5 square pyramids that share corners with four equivalent Cr(1)O5 square pyramids and  a cornercorner with one Ga(1)O4 tetrahedra. Ga(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form GaO4 tetrahedra that share corners with two equivalent Cr(1)O5 square pyramids and corners with two equivalent Ga(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Y(1), and two equivalent Cr(1) atoms. In the second O site, O(2) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form distorted corner-sharing OSr2Ga2 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Cr(1), and one Ga(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Y(1), and two equivalent Cr(1) atoms. is represented by the CIF card [CIF]
data_Sr2YCr2GaO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.205
_cell_length_b   12.205
_cell_length_c   12.205
_cell_angle_alpha   153.428
_cell_angle_beta   152.792
_cell_angle_gamma   38.397
_symmetry_Int_Tables_number   1
_cell_volume   371.240
_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  0.872  0.830  0.010  1.0
  Sr  Sr1  1  0.128  0.138  0.957  1.0
  Sr  Sr2  1  0.319  0.330  0.957  1.0
  Sr  Sr3  1  0.681  0.638  0.010  1.0
  Y  Y4  1  0.500  0.495  0.995  1.0
  Y  Y5  1  0.000  0.995  0.995  1.0
  Cr  Cr6  1  0.077  0.573  0.500  1.0
  Cr  Cr7  1  0.427  0.923  0.500  1.0
  Cr  Cr8  1  0.573  0.073  0.496  1.0
  Cr  Cr9  1  0.923  0.423  0.496  1.0
  Ga  Ga10  1  0.322  0.714  0.536  1.0
  Ga  Ga11  1  0.678  0.214  0.392  1.0
  O  O12  1  0.225  0.646  0.999  1.0
  O  O13  1  0.383  0.376  0.259  1.0
  O  O14  1  0.147  0.146  0.421  1.0
  O  O15  1  0.732  0.206  0.582  1.0
  O  O16  1  0.273  0.860  0.999  1.0
  O  O17  1  0.361  0.360  0.587  1.0
  O  O18  1  0.617  0.876  0.993  1.0
  O  O19  1  0.853  0.274  0.999  1.0
  O  O20  1  0.775  0.774  0.421  1.0
  O  O21  1  0.124  0.706  0.475  1.0
  O  O22  1  0.268  0.850  0.475  1.0
  O  O23  1  0.876  0.350  0.582  1.0
  O  O24  1  0.727  0.726  0.587  1.0
  O  O25  1  0.639  0.226  0.999  1.0
[/CIF]
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The material structure described by Sr2YCr2GaO7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. Y(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(4) atoms. Cr(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(4) atoms to form CrO5 square pyramids that share corners with four equivalent Cr(1)O5 square pyramids and  a cornercorner with one Ga(1)O4 tetrahedra. Ga(1) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form GaO4 tetrahedra that share corners with two equivalent Cr(1)O5 square pyramids and corners with two equivalent Ga(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Y(1), and two equivalent Cr(1) atoms. In the second O site, O(2) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form distorted corner-sharing OSr2Ga2 tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Cr(1), and one Ga(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Y(1), and two equivalent Cr(1) atoms. is represented by the CIF card [CIF]
data_Sr2YCr2GaO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.205
_cell_length_b   12.205
_cell_length_c   12.205
_cell_angle_alpha   153.428
_cell_angle_beta   152.792
_cell_angle_gamma   38.397
_symmetry_Int_Tables_number   1
_cell_volume   371.240
_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  0.872  0.830  0.010  1.0
  Sr  Sr1  1  0.128  0.138  0.957  1.0
  Sr  Sr2  1  0.319  0.330  0.957  1.0
  Sr  Sr3  1  0.681  0.638  0.010  1.0
  Y  Y4  1  0.500  0.495  0.995  1.0
  Y  Y5  1  0.000  0.995  0.995  1.0
  Cr  Cr6  1  0.077  0.573  0.500  1.0
  Cr  Cr7  1  0.427  0.923  0.500  1.0
  Cr  Cr8  1  0.573  0.073  0.496  1.0
  Cr  Cr9  1  0.923  0.423  0.496  1.0
  Ga  Ga10  1  0.322  0.714  0.536  1.0
  Ga  Ga11  1  0.678  0.214  0.392  1.0
  O  O12  1  0.225  0.646  0.999  1.0
  O  O13  1  0.383  0.376  0.259  1.0
  O  O14  1  0.147  0.146  0.421  1.0
  O  O15  1  0.732  0.206  0.582  1.0
  O  O16  1  0.273  0.860  0.999  1.0
  O  O17  1  0.361  0.360  0.587  1.0
  O  O18  1  0.617  0.876  0.993  1.0
  O  O19  1  0.853  0.274  0.999  1.0
  O  O20  1  0.775  0.774  0.421  1.0
  O  O21  1  0.124  0.706  0.475  1.0
  O  O22  1  0.268  0.850  0.475  1.0
  O  O23  1  0.876  0.350  0.582  1.0
  O  O24  1  0.727  0.726  0.587  1.0
  O  O25  1  0.639  0.226  0.999  1.0
[/CIF]
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