The compound described by Eu2V2O5 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 V sites. In the first V site, V(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form VO6 octahedra that share corners with four equivalent V(1)O6 octahedra and corners with two equivalent V(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 10°. In the second V site, V(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form VO4 tetrahedra that share corners with two equivalent V(1)O6 octahedra and corners with two equivalent V(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 35°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Eu(1) and two equivalent V(1) atoms to form distorted OEu4V2 octahedra that share corners with two equivalent O(1)Eu4V2 octahedra, corners with four equivalent O(3)Eu2V2 tetrahedra, edges with two equivalent O(1)Eu4V2 octahedra, and faces with four equivalent O(1)Eu4V2 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 V(1), and one V(2) atom. In the third O site, O(3) is bonded to two equivalent Eu(1) and two equivalent V(2) atoms to form distorted OEu2V2 tetrahedra that share corners with eight equivalent O(1)Eu4V2 octahedra and corners with two equivalent O(3)Eu2V2 tetrahedra. The corner-sharing octahedral tilt angles range from 22-79°. is represented by the CIF file [CIF]
data_Eu2V2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.777
_cell_length_b   8.777
_cell_length_c   8.777
_cell_angle_alpha   143.112
_cell_angle_beta   141.541
_cell_angle_gamma   54.348
_symmetry_Int_Tables_number   1
_cell_volume   250.690
_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  0.913  0.396  0.525  1.0
  Eu  Eu1  1  0.087  0.613  0.483  1.0
  Eu  Eu2  1  0.371  0.896  0.483  1.0
  Eu  Eu3  1  0.629  0.113  0.525  1.0
  V  V4  1  0.000  0.011  0.011  1.0
  V  V5  1  0.500  0.511  0.011  1.0
  V  V6  1  0.684  0.713  0.897  1.0
  V  V7  1  0.316  0.213  0.029  1.0
  O  O8  1  0.265  0.269  0.511  1.0
  O  O9  1  0.735  0.246  0.004  1.0
  O  O10  1  0.258  0.769  0.004  1.0
  O  O11  1  0.742  0.746  0.511  1.0
  O  O12  1  0.923  0.890  0.091  1.0
  O  O13  1  0.077  0.168  0.967  1.0
  O  O14  1  0.300  0.390  0.967  1.0
  O  O15  1  0.700  0.668  0.091  1.0
  O  O16  1  0.626  0.358  0.484  1.0
  O  O17  1  0.374  0.858  0.733  1.0
[/CIF]
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The compound described by Eu2V2O5 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 V sites. In the first V site, V(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form VO6 octahedra that share corners with four equivalent V(1)O6 octahedra and corners with two equivalent V(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 10°. In the second V site, V(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form VO4 tetrahedra that share corners with two equivalent V(1)O6 octahedra and corners with two equivalent V(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 35°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Eu(1) and two equivalent V(1) atoms to form distorted OEu4V2 octahedra that share corners with two equivalent O(1)Eu4V2 octahedra, corners with four equivalent O(3)Eu2V2 tetrahedra, edges with two equivalent O(1)Eu4V2 octahedra, and faces with four equivalent O(1)Eu4V2 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 V(1), and one V(2) atom. In the third O site, O(3) is bonded to two equivalent Eu(1) and two equivalent V(2) atoms to form distorted OEu2V2 tetrahedra that share corners with eight equivalent O(1)Eu4V2 octahedra and corners with two equivalent O(3)Eu2V2 tetrahedra. The corner-sharing octahedral tilt angles range from 22-79°. is represented by the CIF file [CIF]
data_Eu2V2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.777
_cell_length_b   8.777
_cell_length_c   8.777
_cell_angle_alpha   143.112
_cell_angle_beta   141.541
_cell_angle_gamma   54.348
_symmetry_Int_Tables_number   1
_cell_volume   250.690
_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  0.913  0.396  0.525  1.0
  Eu  Eu1  1  0.087  0.613  0.483  1.0
  Eu  Eu2  1  0.371  0.896  0.483  1.0
  Eu  Eu3  1  0.629  0.113  0.525  1.0
  V  V4  1  0.000  0.011  0.011  1.0
  V  V5  1  0.500  0.511  0.011  1.0
  V  V6  1  0.684  0.713  0.897  1.0
  V  V7  1  0.316  0.213  0.029  1.0
  O  O8  1  0.265  0.269  0.511  1.0
  O  O9  1  0.735  0.246  0.004  1.0
  O  O10  1  0.258  0.769  0.004  1.0
  O  O11  1  0.742  0.746  0.511  1.0
  O  O12  1  0.923  0.890  0.091  1.0
  O  O13  1  0.077  0.168  0.967  1.0
  O  O14  1  0.300  0.390  0.967  1.0
  O  O15  1  0.700  0.668  0.091  1.0
  O  O16  1  0.626  0.358  0.484  1.0
  O  O17  1  0.374  0.858  0.733  1.0
[/CIF]
.