The structure described by Sr2YW2GaO7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), and two equivalent O(3) atoms. Y(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(4) atoms. W(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(4) atoms to form WO5 square pyramids that share corners with four equivalent W(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 W(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 4-coordinate geometry to one Sr(1), one Y(1), and two equivalent W(1) atoms. In the second O site, O(2) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form OSr2Ga2 tetrahedra that share corners with two equivalent O(2)Sr2Ga2 tetrahedra and corners with two equivalent O(4)SrYW2 trigonal pyramids. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one W(1), and one Ga(1) atom. In the fourth O site, O(4) is bonded to one Sr(1), one Y(1), and two equivalent W(1) atoms to form distorted OSrYW2 trigonal pyramids that share  a cornercorner with one O(2)Sr2Ga2 tetrahedra and corners with three equivalent O(4)SrYW2 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2YGaW2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.044
_cell_length_b   12.044
_cell_length_c   12.044
_cell_angle_alpha   152.220
_cell_angle_beta   150.863
_cell_angle_gamma   40.694
_symmetry_Int_Tables_number   1
_cell_volume   395.661
_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  0.379  0.813  0.511  1.0
  Sr  Sr1  1  0.621  0.132  0.434  1.0
  Sr  Sr2  1  0.803  0.313  0.434  1.0
  Sr  Sr3  1  0.197  0.632  0.511  1.0
  Y  Y4  1  0.000  0.500  0.500  1.0
  Y  Y5  1  0.500  1.000  0.500  1.0
  Ga  Ga6  1  0.830  0.713  0.043  1.0
  Ga  Ga7  1  0.170  0.213  0.883  1.0
  W  W8  1  0.574  0.571  0.002  1.0
  W  W9  1  0.931  0.928  0.002  1.0
  W  W10  1  0.069  0.071  0.997  1.0
  W  W11  1  0.426  0.428  0.997  1.0
  O  O12  1  0.738  0.610  0.494  1.0
  O  O13  1  0.898  0.387  0.785  1.0
  O  O14  1  0.616  0.110  0.872  1.0
  O  O15  1  0.233  0.202  0.078  1.0
  O  O16  1  0.757  0.899  0.505  1.0
  O  O17  1  0.894  0.399  0.142  1.0
  O  O18  1  0.102  0.887  0.488  1.0
  O  O19  1  0.384  0.257  0.494  1.0
  O  O20  1  0.262  0.757  0.872  1.0
  O  O21  1  0.623  0.702  0.969  1.0
  O  O22  1  0.767  0.846  0.969  1.0
  O  O23  1  0.377  0.346  0.078  1.0
  O  O24  1  0.243  0.748  0.142  1.0
  O  O25  1  0.106  0.248  0.505  1.0
[/CIF]
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The structure described by Sr2YW2GaO7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), and two equivalent O(3) atoms. Y(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(4) atoms. W(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(4) atoms to form WO5 square pyramids that share corners with four equivalent W(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 W(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 4-coordinate geometry to one Sr(1), one Y(1), and two equivalent W(1) atoms. In the second O site, O(2) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form OSr2Ga2 tetrahedra that share corners with two equivalent O(2)Sr2Ga2 tetrahedra and corners with two equivalent O(4)SrYW2 trigonal pyramids. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one W(1), and one Ga(1) atom. In the fourth O site, O(4) is bonded to one Sr(1), one Y(1), and two equivalent W(1) atoms to form distorted OSrYW2 trigonal pyramids that share  a cornercorner with one O(2)Sr2Ga2 tetrahedra and corners with three equivalent O(4)SrYW2 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2YGaW2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.044
_cell_length_b   12.044
_cell_length_c   12.044
_cell_angle_alpha   152.220
_cell_angle_beta   150.863
_cell_angle_gamma   40.694
_symmetry_Int_Tables_number   1
_cell_volume   395.661
_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  0.379  0.813  0.511  1.0
  Sr  Sr1  1  0.621  0.132  0.434  1.0
  Sr  Sr2  1  0.803  0.313  0.434  1.0
  Sr  Sr3  1  0.197  0.632  0.511  1.0
  Y  Y4  1  0.000  0.500  0.500  1.0
  Y  Y5  1  0.500  1.000  0.500  1.0
  Ga  Ga6  1  0.830  0.713  0.043  1.0
  Ga  Ga7  1  0.170  0.213  0.883  1.0
  W  W8  1  0.574  0.571  0.002  1.0
  W  W9  1  0.931  0.928  0.002  1.0
  W  W10  1  0.069  0.071  0.997  1.0
  W  W11  1  0.426  0.428  0.997  1.0
  O  O12  1  0.738  0.610  0.494  1.0
  O  O13  1  0.898  0.387  0.785  1.0
  O  O14  1  0.616  0.110  0.872  1.0
  O  O15  1  0.233  0.202  0.078  1.0
  O  O16  1  0.757  0.899  0.505  1.0
  O  O17  1  0.894  0.399  0.142  1.0
  O  O18  1  0.102  0.887  0.488  1.0
  O  O19  1  0.384  0.257  0.494  1.0
  O  O20  1  0.262  0.757  0.872  1.0
  O  O21  1  0.623  0.702  0.969  1.0
  O  O22  1  0.767  0.846  0.969  1.0
  O  O23  1  0.377  0.346  0.078  1.0
  O  O24  1  0.243  0.748  0.142  1.0
  O  O25  1  0.106  0.248  0.505  1.0
[/CIF]
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