The material structure described by Sr2EuFeO5 crystallizes in the orthorhombic Fmmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted q6 geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Fe(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), two equivalent Sr(1), two equivalent Eu(1), and one Fe(1) atom to form distorted OSr3Eu2Fe octahedra that share corners with four equivalent O(1)Sr3Eu2Fe octahedra, corners with four equivalent O(3)Sr4Eu2 octahedra, corners with six equivalent O(2)Sr4EuFe octahedra, edges with two equivalent O(1)Sr3Eu2Fe octahedra, edges with six equivalent O(2)Sr4EuFe octahedra, faces with two equivalent O(1)Sr3Eu2Fe octahedra, and faces with two equivalent O(3)Sr4Eu2 octahedra. The corner-sharing octahedral tilt angles range from 30-65°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Eu(1), and one Fe(1) atom to form distorted OSr4EuFe octahedra that share corners with four equivalent O(3)Sr4Eu2 octahedra, corners with four equivalent O(2)Sr4EuFe octahedra, corners with six equivalent O(1)Sr3Eu2Fe octahedra, edges with two equivalent O(2)Sr4EuFe octahedra, edges with six equivalent O(1)Sr3Eu2Fe octahedra, faces with two equivalent O(3)Sr4Eu2 octahedra, and faces with two equivalent O(2)Sr4EuFe octahedra. The corner-sharing octahedral tilt angles range from 30-65°. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Eu(1) atoms to form OSr4Eu2 octahedra that share corners with six equivalent O(3)Sr4Eu2 octahedra, corners with eight equivalent O(1)Sr3Eu2Fe octahedra, corners with eight equivalent O(2)Sr4EuFe octahedra, faces with four equivalent O(1)Sr3Eu2Fe octahedra, and faces with four equivalent O(2)Sr4EuFe octahedra. The corner-sharing octahedral tilt angles range from 0-65°. is represented by the CIF file [CIF]
data_Sr2EuFeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.839
_cell_length_b   6.839
_cell_length_c   7.506
_cell_angle_alpha   63.008
_cell_angle_beta   63.008
_cell_angle_gamma   90.213
_symmetry_Int_Tables_number   1
_cell_volume   268.874
_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  0.250  0.250  0.500  1.0
  Sr  Sr1  1  0.750  0.750  0.500  1.0
  Sr  Sr2  1  0.327  0.827  0.000  1.0
  Sr  Sr3  1  0.673  0.173  0.000  1.0
  Eu  Eu4  1  0.180  0.320  0.000  1.0
  Eu  Eu5  1  0.820  0.680  0.000  1.0
  Fe  Fe6  1  0.252  0.752  0.496  1.0
  Fe  Fe7  1  0.748  0.248  0.504  1.0
  O  O8  1  0.001  0.501  0.286  1.0
  O  O9  1  0.713  0.213  0.286  1.0
  O  O10  1  0.206  0.008  0.286  1.0
  O  O11  1  0.508  0.706  0.286  1.0
  O  O12  1  0.999  0.499  0.714  1.0
  O  O13  1  0.287  0.787  0.714  1.0
  O  O14  1  0.794  0.992  0.714  1.0
  O  O15  1  0.492  0.294  0.714  1.0
  O  O16  1  0.500  0.500  0.000  1.0
  O  O17  1  0.000  0.000  0.000  1.0
[/CIF]
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The material structure described by Sr2EuFeO5 crystallizes in the orthorhombic Fmmm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted q6 geometry to two equivalent O(3), four equivalent O(1), and four equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Fe(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), two equivalent Sr(1), two equivalent Eu(1), and one Fe(1) atom to form distorted OSr3Eu2Fe octahedra that share corners with four equivalent O(1)Sr3Eu2Fe octahedra, corners with four equivalent O(3)Sr4Eu2 octahedra, corners with six equivalent O(2)Sr4EuFe octahedra, edges with two equivalent O(1)Sr3Eu2Fe octahedra, edges with six equivalent O(2)Sr4EuFe octahedra, faces with two equivalent O(1)Sr3Eu2Fe octahedra, and faces with two equivalent O(3)Sr4Eu2 octahedra. The corner-sharing octahedral tilt angles range from 30-65°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(2), one Eu(1), and one Fe(1) atom to form distorted OSr4EuFe octahedra that share corners with four equivalent O(3)Sr4Eu2 octahedra, corners with four equivalent O(2)Sr4EuFe octahedra, corners with six equivalent O(1)Sr3Eu2Fe octahedra, edges with two equivalent O(2)Sr4EuFe octahedra, edges with six equivalent O(1)Sr3Eu2Fe octahedra, faces with two equivalent O(3)Sr4Eu2 octahedra, and faces with two equivalent O(2)Sr4EuFe octahedra. The corner-sharing octahedral tilt angles range from 30-65°. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Eu(1) atoms to form OSr4Eu2 octahedra that share corners with six equivalent O(3)Sr4Eu2 octahedra, corners with eight equivalent O(1)Sr3Eu2Fe octahedra, corners with eight equivalent O(2)Sr4EuFe octahedra, faces with four equivalent O(1)Sr3Eu2Fe octahedra, and faces with four equivalent O(2)Sr4EuFe octahedra. The corner-sharing octahedral tilt angles range from 0-65°. is represented by the CIF file [CIF]
data_Sr2EuFeO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.839
_cell_length_b   6.839
_cell_length_c   7.506
_cell_angle_alpha   63.008
_cell_angle_beta   63.008
_cell_angle_gamma   90.213
_symmetry_Int_Tables_number   1
_cell_volume   268.874
_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  0.250  0.250  0.500  1.0
  Sr  Sr1  1  0.750  0.750  0.500  1.0
  Sr  Sr2  1  0.327  0.827  0.000  1.0
  Sr  Sr3  1  0.673  0.173  0.000  1.0
  Eu  Eu4  1  0.180  0.320  0.000  1.0
  Eu  Eu5  1  0.820  0.680  0.000  1.0
  Fe  Fe6  1  0.252  0.752  0.496  1.0
  Fe  Fe7  1  0.748  0.248  0.504  1.0
  O  O8  1  0.001  0.501  0.286  1.0
  O  O9  1  0.713  0.213  0.286  1.0
  O  O10  1  0.206  0.008  0.286  1.0
  O  O11  1  0.508  0.706  0.286  1.0
  O  O12  1  0.999  0.499  0.714  1.0
  O  O13  1  0.287  0.787  0.714  1.0
  O  O14  1  0.794  0.992  0.714  1.0
  O  O15  1  0.492  0.294  0.714  1.0
  O  O16  1  0.500  0.500  0.000  1.0
  O  O17  1  0.000  0.000  0.000  1.0
[/CIF]
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