The material described by Bi2Fe2Ga2O9 crystallizes in the orthorhombic Pbam space group. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with four equivalent Ga(1)O4 tetrahedra and edges with two equivalent Fe(1)O6 octahedra. Ga(1) is bonded to one O(3), one O(4), and two equivalent O(1) atoms to form GaO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra and  a cornercorner with one Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-60°. Bi(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Fe(1), one Ga(1), and one Bi(1) atom. In the second O site, O(2) is bonded to two equivalent Fe(1) and two equivalent Bi(1) atoms to form a mixture of distorted edge and corner-sharing OFe2Bi2 tetrahedra. In the third O site, O(3) is bonded in a linear geometry to two equivalent Ga(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Fe(1) and one Ga(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ga2Fe2Bi2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.975
_cell_length_b   7.951
_cell_length_c   8.329
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   395.709
_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
  Ga  Ga0  1  0.500  0.650  0.833  1.0
  Ga  Ga1  1  0.500  0.850  0.333  1.0
  Ga  Ga2  1  0.500  0.150  0.667  1.0
  Ga  Ga3  1  0.500  0.350  0.167  1.0
  Fe  Fe4  1  0.745  0.500  0.500  1.0
  Fe  Fe5  1  0.255  0.000  0.000  1.0
  Fe  Fe6  1  0.745  0.000  0.000  1.0
  Fe  Fe7  1  0.255  0.500  0.500  1.0
  Bi  Bi8  1  0.000  0.669  0.167  1.0
  Bi  Bi9  1  0.000  0.331  0.833  1.0
  Bi  Bi10  1  0.000  0.169  0.333  1.0
  Bi  Bi11  1  0.000  0.831  0.667  1.0
  O  O12  1  0.242  0.629  0.704  1.0
  O  O13  1  0.758  0.371  0.296  1.0
  O  O14  1  0.242  0.129  0.796  1.0
  O  O15  1  0.000  0.354  0.568  1.0
  O  O16  1  0.000  0.646  0.432  1.0
  O  O17  1  0.758  0.129  0.796  1.0
  O  O18  1  0.242  0.371  0.296  1.0
  O  O19  1  0.500  0.000  0.500  1.0
  O  O20  1  0.758  0.871  0.204  1.0
  O  O21  1  0.000  0.854  0.932  1.0
  O  O22  1  0.500  0.371  0.591  1.0
  O  O23  1  0.500  0.871  0.909  1.0
  O  O24  1  0.000  0.146  0.068  1.0
  O  O25  1  0.500  0.129  0.091  1.0
  O  O26  1  0.500  0.500  0.000  1.0
  O  O27  1  0.500  0.629  0.409  1.0
  O  O28  1  0.758  0.629  0.704  1.0
  O  O29  1  0.242  0.871  0.204  1.0
[/CIF]
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The material described by Bi2Fe2Ga2O9 crystallizes in the orthorhombic Pbam space group. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with four equivalent Ga(1)O4 tetrahedra and edges with two equivalent Fe(1)O6 octahedra. Ga(1) is bonded to one O(3), one O(4), and two equivalent O(1) atoms to form GaO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra and  a cornercorner with one Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-60°. Bi(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Fe(1), one Ga(1), and one Bi(1) atom. In the second O site, O(2) is bonded to two equivalent Fe(1) and two equivalent Bi(1) atoms to form a mixture of distorted edge and corner-sharing OFe2Bi2 tetrahedra. In the third O site, O(3) is bonded in a linear geometry to two equivalent Ga(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Fe(1) and one Ga(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ga2Fe2Bi2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.975
_cell_length_b   7.951
_cell_length_c   8.329
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   395.709
_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
  Ga  Ga0  1  0.500  0.650  0.833  1.0
  Ga  Ga1  1  0.500  0.850  0.333  1.0
  Ga  Ga2  1  0.500  0.150  0.667  1.0
  Ga  Ga3  1  0.500  0.350  0.167  1.0
  Fe  Fe4  1  0.745  0.500  0.500  1.0
  Fe  Fe5  1  0.255  0.000  0.000  1.0
  Fe  Fe6  1  0.745  0.000  0.000  1.0
  Fe  Fe7  1  0.255  0.500  0.500  1.0
  Bi  Bi8  1  0.000  0.669  0.167  1.0
  Bi  Bi9  1  0.000  0.331  0.833  1.0
  Bi  Bi10  1  0.000  0.169  0.333  1.0
  Bi  Bi11  1  0.000  0.831  0.667  1.0
  O  O12  1  0.242  0.629  0.704  1.0
  O  O13  1  0.758  0.371  0.296  1.0
  O  O14  1  0.242  0.129  0.796  1.0
  O  O15  1  0.000  0.354  0.568  1.0
  O  O16  1  0.000  0.646  0.432  1.0
  O  O17  1  0.758  0.129  0.796  1.0
  O  O18  1  0.242  0.371  0.296  1.0
  O  O19  1  0.500  0.000  0.500  1.0
  O  O20  1  0.758  0.871  0.204  1.0
  O  O21  1  0.000  0.854  0.932  1.0
  O  O22  1  0.500  0.371  0.591  1.0
  O  O23  1  0.500  0.871  0.909  1.0
  O  O24  1  0.000  0.146  0.068  1.0
  O  O25  1  0.500  0.129  0.091  1.0
  O  O26  1  0.500  0.500  0.000  1.0
  O  O27  1  0.500  0.629  0.409  1.0
  O  O28  1  0.758  0.629  0.704  1.0
  O  O29  1  0.242  0.871  0.204  1.0
[/CIF]
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