The structure described by Er2V2O7 crystallizes in the cubic Fd-3m space group. Er(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted ErO8 hexagonal bipyramids that share edges with six equivalent Er(1)O8 hexagonal bipyramids and edges with six equivalent V(1)O6 octahedra. V(1) is bonded to six equivalent O(2) atoms to form VO6 octahedra that share corners with six equivalent V(1)O6 octahedra and edges with six equivalent Er(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 50°. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Er(1) atoms to form OEr4 tetrahedra that share corners with four equivalent O(1)Er4 tetrahedra, corners with twelve equivalent O(2)Er2V2 tetrahedra, and edges with six equivalent O(2)Er2V2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Er(1) and two equivalent V(1) atoms to form distorted OEr2V2 tetrahedra that share corners with two equivalent O(1)Er4 tetrahedra, corners with twelve equivalent O(2)Er2V2 tetrahedra,  an edgeedge with one O(1)Er4 tetrahedra, and edges with four equivalent O(2)Er2V2 tetrahedra. is represented by the CIF file [CIF]
data_Er2V2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.028
_cell_length_b   7.028
_cell_length_c   7.028
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   245.500
_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
  Er  Er0  1  0.625  0.125  0.625  1.0
  Er  Er1  1  0.625  0.625  0.625  1.0
  Er  Er2  1  0.125  0.625  0.625  1.0
  Er  Er3  1  0.625  0.625  0.125  1.0
  V  V4  1  0.125  0.625  0.125  1.0
  V  V5  1  0.625  0.125  0.125  1.0
  V  V6  1  0.125  0.125  0.625  1.0
  V  V7  1  0.125  0.125  0.125  1.0
  O  O8  1  0.500  0.500  0.500  1.0
  O  O9  1  0.793  0.793  0.207  1.0
  O  O10  1  0.457  0.043  0.457  1.0
  O  O11  1  0.043  0.457  0.457  1.0
  O  O12  1  0.457  0.043  0.043  1.0
  O  O13  1  0.043  0.043  0.457  1.0
  O  O14  1  0.207  0.207  0.793  1.0
  O  O15  1  0.750  0.750  0.750  1.0
  O  O16  1  0.207  0.793  0.207  1.0
  O  O17  1  0.207  0.793  0.793  1.0
  O  O18  1  0.043  0.457  0.043  1.0
  O  O19  1  0.793  0.207  0.207  1.0
  O  O20  1  0.457  0.457  0.043  1.0
  O  O21  1  0.793  0.207  0.793  1.0
[/CIF]
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The structure described by Er2V2O7 crystallizes in the cubic Fd-3m space group. Er(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted ErO8 hexagonal bipyramids that share edges with six equivalent Er(1)O8 hexagonal bipyramids and edges with six equivalent V(1)O6 octahedra. V(1) is bonded to six equivalent O(2) atoms to form VO6 octahedra that share corners with six equivalent V(1)O6 octahedra and edges with six equivalent Er(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 50°. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Er(1) atoms to form OEr4 tetrahedra that share corners with four equivalent O(1)Er4 tetrahedra, corners with twelve equivalent O(2)Er2V2 tetrahedra, and edges with six equivalent O(2)Er2V2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Er(1) and two equivalent V(1) atoms to form distorted OEr2V2 tetrahedra that share corners with two equivalent O(1)Er4 tetrahedra, corners with twelve equivalent O(2)Er2V2 tetrahedra,  an edgeedge with one O(1)Er4 tetrahedra, and edges with four equivalent O(2)Er2V2 tetrahedra. is represented by the CIF file [CIF]
data_Er2V2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.028
_cell_length_b   7.028
_cell_length_c   7.028
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   245.500
_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
  Er  Er0  1  0.625  0.125  0.625  1.0
  Er  Er1  1  0.625  0.625  0.625  1.0
  Er  Er2  1  0.125  0.625  0.625  1.0
  Er  Er3  1  0.625  0.625  0.125  1.0
  V  V4  1  0.125  0.625  0.125  1.0
  V  V5  1  0.625  0.125  0.125  1.0
  V  V6  1  0.125  0.125  0.625  1.0
  V  V7  1  0.125  0.125  0.125  1.0
  O  O8  1  0.500  0.500  0.500  1.0
  O  O9  1  0.793  0.793  0.207  1.0
  O  O10  1  0.457  0.043  0.457  1.0
  O  O11  1  0.043  0.457  0.457  1.0
  O  O12  1  0.457  0.043  0.043  1.0
  O  O13  1  0.043  0.043  0.457  1.0
  O  O14  1  0.207  0.207  0.793  1.0
  O  O15  1  0.750  0.750  0.750  1.0
  O  O16  1  0.207  0.793  0.207  1.0
  O  O17  1  0.207  0.793  0.793  1.0
  O  O18  1  0.043  0.457  0.043  1.0
  O  O19  1  0.793  0.207  0.207  1.0
  O  O20  1  0.457  0.457  0.043  1.0
  O  O21  1  0.793  0.207  0.793  1.0
[/CIF]
.