The material structure described by Sr3Fe2MoO9 crystallizes in the monoclinic C2/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(2), one O(3), one O(4), one O(6), one O(7), two equivalent O(5), two equivalent O(8), and three equivalent O(1) atoms to form distorted SrO12 cuboctahedra that share corners with five equivalent Sr(2)O12 cuboctahedra, corners with seven equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Fe(1)O6 octahedra,  a faceface with one Fe(3)O6 octahedra, faces with three equivalent Mo(1)O6 octahedra, and faces with three equivalent Fe(2)O6 octahedra. In the second Sr site, Sr(2) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(6), and two equivalent O(7) atoms to form distorted SrO12 cuboctahedra that share corners with two equivalent Sr(2)O12 cuboctahedra, corners with ten equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Mo(1)O6 octahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, and faces with two equivalent Fe(3)O6 octahedra. Mo(1) is bonded to one O(4), one O(5), one O(6), one O(8), and two equivalent O(1) atoms to form MoO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with six equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-13°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Mo(1)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-11°. In the second Fe site, Fe(2) is bonded to one O(3), one O(5), one O(7), one O(8), and two equivalent O(1) atoms to form FeO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Mo(1)O6 octahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with six equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-13°. In the third Fe site, Fe(3) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(7) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-12°. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to four equivalent Sr(1), one Mo(1), and one Fe(2) atom. In the second O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Mo(1), and one Fe(1) atom. In the third O site, O(7) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Fe(2), and one Fe(3) atom. In the fourth O site, O(8) is bonded in a 2-coordinate geometry to four equivalent Sr(1), one Mo(1), and one Fe(2) atom. In the fifth O site, O(1) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), one Mo(1), and one Fe(2) atom. In the sixth O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Fe(1), and one Fe(3) atom to form a mixture of distorted face and corner-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the seventh O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Fe(2), and one Fe(3) atom to form a mixture of distorted edge, face, and corner-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the eighth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Mo(1), and one Fe(1) atom. is represented by the CIF file [CIF]
data_Sr3Fe2MoO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.775
_cell_length_b   9.775
_cell_length_c   5.630
_cell_angle_alpha   73.291
_cell_angle_beta   73.291
_cell_angle_gamma   48.368
_symmetry_Int_Tables_number   1
_cell_volume   381.603
_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  0.918  0.399  0.844  1.0
  Sr  Sr1  1  0.233  0.767  0.500  1.0
  Sr  Sr2  1  0.601  0.082  0.156  1.0
  Sr  Sr3  1  0.767  0.233  0.500  1.0
  Sr  Sr4  1  0.082  0.601  0.156  1.0
  Sr  Sr5  1  0.399  0.918  0.844  1.0
  Fe  Fe6  1  0.500  0.500  0.000  1.0
  Fe  Fe7  1  0.835  0.835  0.664  1.0
  Fe  Fe8  1  0.165  0.165  0.336  1.0
  Fe  Fe9  1  0.000  0.000  0.000  1.0
  Mo  Mo10  1  0.332  0.332  0.666  1.0
  Mo  Mo11  1  0.668  0.668  0.334  1.0
  O  O12  1  0.426  0.912  0.331  1.0
  O  O13  1  0.744  0.256  0.000  1.0
  O  O14  1  0.088  0.574  0.669  1.0
  O  O15  1  0.912  0.426  0.331  1.0
  O  O16  1  0.256  0.744  0.000  1.0
  O  O17  1  0.574  0.088  0.669  1.0
  O  O18  1  0.079  0.079  0.191  1.0
  O  O19  1  0.406  0.406  0.857  1.0
  O  O20  1  0.739  0.739  0.533  1.0
  O  O21  1  0.594  0.594  0.143  1.0
  O  O22  1  0.921  0.921  0.809  1.0
  O  O23  1  0.261  0.261  0.467  1.0
  O  O24  1  0.579  0.579  0.640  1.0
  O  O25  1  0.907  0.907  0.323  1.0
  O  O26  1  0.245  0.245  0.977  1.0
  O  O27  1  0.093  0.093  0.677  1.0
  O  O28  1  0.421  0.421  0.360  1.0
  O  O29  1  0.755  0.755  0.023  1.0
[/CIF]
.
The material structure described by Sr3Fe2MoO9 crystallizes in the monoclinic C2/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(2), one O(3), one O(4), one O(6), one O(7), two equivalent O(5), two equivalent O(8), and three equivalent O(1) atoms to form distorted SrO12 cuboctahedra that share corners with five equivalent Sr(2)O12 cuboctahedra, corners with seven equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Fe(1)O6 octahedra,  a faceface with one Fe(3)O6 octahedra, faces with three equivalent Mo(1)O6 octahedra, and faces with three equivalent Fe(2)O6 octahedra. In the second Sr site, Sr(2) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), two equivalent O(6), and two equivalent O(7) atoms to form distorted SrO12 cuboctahedra that share corners with two equivalent Sr(2)O12 cuboctahedra, corners with ten equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Sr(2)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Mo(1)O6 octahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, and faces with two equivalent Fe(3)O6 octahedra. Mo(1) is bonded to one O(4), one O(5), one O(6), one O(8), and two equivalent O(1) atoms to form MoO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with six equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-13°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Mo(1)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-11°. In the second Fe site, Fe(2) is bonded to one O(3), one O(5), one O(7), one O(8), and two equivalent O(1) atoms to form FeO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with four equivalent Mo(1)O6 octahedra, faces with two equivalent Sr(2)O12 cuboctahedra, and faces with six equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 3-13°. In the third Fe site, Fe(3) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(7) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, faces with four equivalent Sr(1)O12 cuboctahedra, and faces with four equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-12°. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to four equivalent Sr(1), one Mo(1), and one Fe(2) atom. In the second O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Mo(1), and one Fe(1) atom. In the third O site, O(7) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Fe(2), and one Fe(3) atom. In the fourth O site, O(8) is bonded in a 2-coordinate geometry to four equivalent Sr(1), one Mo(1), and one Fe(2) atom. In the fifth O site, O(1) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), one Mo(1), and one Fe(2) atom. In the sixth O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Fe(1), and one Fe(3) atom to form a mixture of distorted face and corner-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the seventh O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Fe(2), and one Fe(3) atom to form a mixture of distorted edge, face, and corner-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the eighth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one Mo(1), and one Fe(1) atom. is represented by the CIF file [CIF]
data_Sr3Fe2MoO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.775
_cell_length_b   9.775
_cell_length_c   5.630
_cell_angle_alpha   73.291
_cell_angle_beta   73.291
_cell_angle_gamma   48.368
_symmetry_Int_Tables_number   1
_cell_volume   381.603
_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  0.918  0.399  0.844  1.0
  Sr  Sr1  1  0.233  0.767  0.500  1.0
  Sr  Sr2  1  0.601  0.082  0.156  1.0
  Sr  Sr3  1  0.767  0.233  0.500  1.0
  Sr  Sr4  1  0.082  0.601  0.156  1.0
  Sr  Sr5  1  0.399  0.918  0.844  1.0
  Fe  Fe6  1  0.500  0.500  0.000  1.0
  Fe  Fe7  1  0.835  0.835  0.664  1.0
  Fe  Fe8  1  0.165  0.165  0.336  1.0
  Fe  Fe9  1  0.000  0.000  0.000  1.0
  Mo  Mo10  1  0.332  0.332  0.666  1.0
  Mo  Mo11  1  0.668  0.668  0.334  1.0
  O  O12  1  0.426  0.912  0.331  1.0
  O  O13  1  0.744  0.256  0.000  1.0
  O  O14  1  0.088  0.574  0.669  1.0
  O  O15  1  0.912  0.426  0.331  1.0
  O  O16  1  0.256  0.744  0.000  1.0
  O  O17  1  0.574  0.088  0.669  1.0
  O  O18  1  0.079  0.079  0.191  1.0
  O  O19  1  0.406  0.406  0.857  1.0
  O  O20  1  0.739  0.739  0.533  1.0
  O  O21  1  0.594  0.594  0.143  1.0
  O  O22  1  0.921  0.921  0.809  1.0
  O  O23  1  0.261  0.261  0.467  1.0
  O  O24  1  0.579  0.579  0.640  1.0
  O  O25  1  0.907  0.907  0.323  1.0
  O  O26  1  0.245  0.245  0.977  1.0
  O  O27  1  0.093  0.093  0.677  1.0
  O  O28  1  0.421  0.421  0.360  1.0
  O  O29  1  0.755  0.755  0.023  1.0
[/CIF]
.