The material structure described by Eu2Cr2O5 crystallizes in the orthorhombic Ima2 space group. Eu(1) is bonded in a 8-coordinate geometry to one O(3), three equivalent O(2), and four equivalent O(1) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CrO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra and corners with two equivalent Cr(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 12°. In the second Cr site, Cr(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form CrO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra and corners with two equivalent Cr(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 26°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Eu(1) and two equivalent Cr(1) atoms to form distorted OEu4Cr2 octahedra that share corners with two equivalent O(1)Eu4Cr2 octahedra, corners with four equivalent O(3)Eu2Cr2 tetrahedra, edges with two equivalent O(1)Eu4Cr2 octahedra, and faces with four equivalent O(1)Eu4Cr2 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Eu(1), one Cr(1), and one Cr(2) atom. In the third O site, O(3) is bonded to two equivalent Eu(1) and two equivalent Cr(2) atoms to form distorted OEu2Cr2 tetrahedra that share corners with eight equivalent O(1)Eu4Cr2 octahedra and corners with two equivalent O(3)Eu2Cr2 tetrahedra. The corner-sharing octahedral tilt angles range from 23-75°. is represented by the CIF card [CIF]
data_Eu2Cr2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.801
_cell_length_b   8.801
_cell_length_c   8.801
_cell_angle_alpha   143.637
_cell_angle_beta   142.822
_cell_angle_gamma   52.984
_symmetry_Int_Tables_number   1
_cell_volume   242.710
_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
  Eu  Eu0  1  0.876  0.384  0.480  1.0
  Eu  Eu1  1  0.124  0.604  0.508  1.0
  Eu  Eu2  1  0.404  0.884  0.508  1.0
  Eu  Eu3  1  0.596  0.104  0.480  1.0
  Cr  Cr4  1  0.000  0.990  0.990  1.0
  Cr  Cr5  1  0.500  0.490  0.990  1.0
  Cr  Cr6  1  0.795  0.774  0.070  1.0
  Cr  Cr7  1  0.205  0.274  0.979  1.0
  O  O8  1  0.759  0.756  0.489  1.0
  O  O9  1  0.241  0.730  0.997  1.0
  O  O10  1  0.767  0.256  0.997  1.0
  O  O11  1  0.233  0.230  0.489  1.0
  O  O12  1  0.818  0.848  0.925  1.0
  O  O13  1  0.182  0.107  0.029  1.0
  O  O14  1  0.423  0.348  0.029  1.0
  O  O15  1  0.577  0.607  0.925  1.0
  O  O16  1  0.858  0.142  0.500  1.0
  O  O17  1  0.142  0.642  0.284  1.0
[/CIF]
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The material structure described by Eu2Cr2O5 crystallizes in the orthorhombic Ima2 space group. Eu(1) is bonded in a 8-coordinate geometry to one O(3), three equivalent O(2), and four equivalent O(1) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CrO6 octahedra that share corners with four equivalent Cr(1)O6 octahedra and corners with two equivalent Cr(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 12°. In the second Cr site, Cr(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form CrO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra and corners with two equivalent Cr(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 26°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Eu(1) and two equivalent Cr(1) atoms to form distorted OEu4Cr2 octahedra that share corners with two equivalent O(1)Eu4Cr2 octahedra, corners with four equivalent O(3)Eu2Cr2 tetrahedra, edges with two equivalent O(1)Eu4Cr2 octahedra, and faces with four equivalent O(1)Eu4Cr2 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Eu(1), one Cr(1), and one Cr(2) atom. In the third O site, O(3) is bonded to two equivalent Eu(1) and two equivalent Cr(2) atoms to form distorted OEu2Cr2 tetrahedra that share corners with eight equivalent O(1)Eu4Cr2 octahedra and corners with two equivalent O(3)Eu2Cr2 tetrahedra. The corner-sharing octahedral tilt angles range from 23-75°. is represented by the CIF card [CIF]
data_Eu2Cr2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.801
_cell_length_b   8.801
_cell_length_c   8.801
_cell_angle_alpha   143.637
_cell_angle_beta   142.822
_cell_angle_gamma   52.984
_symmetry_Int_Tables_number   1
_cell_volume   242.710
_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
  Eu  Eu0  1  0.876  0.384  0.480  1.0
  Eu  Eu1  1  0.124  0.604  0.508  1.0
  Eu  Eu2  1  0.404  0.884  0.508  1.0
  Eu  Eu3  1  0.596  0.104  0.480  1.0
  Cr  Cr4  1  0.000  0.990  0.990  1.0
  Cr  Cr5  1  0.500  0.490  0.990  1.0
  Cr  Cr6  1  0.795  0.774  0.070  1.0
  Cr  Cr7  1  0.205  0.274  0.979  1.0
  O  O8  1  0.759  0.756  0.489  1.0
  O  O9  1  0.241  0.730  0.997  1.0
  O  O10  1  0.767  0.256  0.997  1.0
  O  O11  1  0.233  0.230  0.489  1.0
  O  O12  1  0.818  0.848  0.925  1.0
  O  O13  1  0.182  0.107  0.029  1.0
  O  O14  1  0.423  0.348  0.029  1.0
  O  O15  1  0.577  0.607  0.925  1.0
  O  O16  1  0.858  0.142  0.500  1.0
  O  O17  1  0.142  0.642  0.284  1.0
[/CIF]
.