The material described by Pr2Ir2O7 crystallizes in the cubic Fd-3m space group. Pr(1) is bonded to two equivalent O(2) and six equivalent O(1) atoms to form distorted PrO8 hexagonal bipyramids that share edges with six equivalent Pr(1)O8 hexagonal bipyramids and edges with six equivalent Ir(1)O6 octahedra. Ir(1) is bonded to six equivalent O(1) atoms to form IrO6 octahedra that share corners with six equivalent Ir(1)O6 octahedra and edges with six equivalent Pr(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 49°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Pr(1) and two equivalent Ir(1) atoms to form distorted OPr2Ir2 tetrahedra that share corners with two equivalent O(2)Pr4 tetrahedra, corners with twelve equivalent O(1)Pr2Ir2 tetrahedra,  an edgeedge with one O(2)Pr4 tetrahedra, and edges with four equivalent O(1)Pr2Ir2 tetrahedra. In the second O site, O(2) is bonded to four equivalent Pr(1) atoms to form OPr4 tetrahedra that share corners with four equivalent O(2)Pr4 tetrahedra, corners with twelve equivalent O(1)Pr2Ir2 tetrahedra, and edges with six equivalent O(1)Pr2Ir2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Pr2Ir2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.397
_cell_length_b   7.397
_cell_length_c   7.397
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   286.176
_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
  Pr  Pr0  1  0.125  0.125  0.625  1.0
  Pr  Pr1  1  0.125  0.125  0.125  1.0
  Pr  Pr2  1  0.625  0.125  0.125  1.0
  Pr  Pr3  1  0.125  0.625  0.125  1.0
  Ir  Ir4  1  0.625  0.625  0.625  1.0
  Ir  Ir5  1  0.125  0.625  0.625  1.0
  Ir  Ir6  1  0.625  0.125  0.625  1.0
  Ir  Ir7  1  0.625  0.625  0.125  1.0
  O  O8  1  0.956  0.544  0.544  1.0
  O  O9  1  0.294  0.294  0.706  1.0
  O  O10  1  0.956  0.544  0.956  1.0
  O  O11  1  0.706  0.294  0.294  1.0
  O  O12  1  0.544  0.544  0.956  1.0
  O  O13  1  0.544  0.956  0.544  1.0
  O  O14  1  0.544  0.956  0.956  1.0
  O  O15  1  0.250  0.250  0.250  1.0
  O  O16  1  0.294  0.706  0.706  1.0
  O  O17  1  0.706  0.294  0.706  1.0
  O  O18  1  0.000  0.000  0.000  1.0
  O  O19  1  0.956  0.956  0.544  1.0
  O  O20  1  0.294  0.706  0.294  1.0
  O  O21  1  0.706  0.706  0.294  1.0
[/CIF]
.
The material described by Pr2Ir2O7 crystallizes in the cubic Fd-3m space group. Pr(1) is bonded to two equivalent O(2) and six equivalent O(1) atoms to form distorted PrO8 hexagonal bipyramids that share edges with six equivalent Pr(1)O8 hexagonal bipyramids and edges with six equivalent Ir(1)O6 octahedra. Ir(1) is bonded to six equivalent O(1) atoms to form IrO6 octahedra that share corners with six equivalent Ir(1)O6 octahedra and edges with six equivalent Pr(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 49°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Pr(1) and two equivalent Ir(1) atoms to form distorted OPr2Ir2 tetrahedra that share corners with two equivalent O(2)Pr4 tetrahedra, corners with twelve equivalent O(1)Pr2Ir2 tetrahedra,  an edgeedge with one O(2)Pr4 tetrahedra, and edges with four equivalent O(1)Pr2Ir2 tetrahedra. In the second O site, O(2) is bonded to four equivalent Pr(1) atoms to form OPr4 tetrahedra that share corners with four equivalent O(2)Pr4 tetrahedra, corners with twelve equivalent O(1)Pr2Ir2 tetrahedra, and edges with six equivalent O(1)Pr2Ir2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Pr2Ir2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.397
_cell_length_b   7.397
_cell_length_c   7.397
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   286.176
_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
  Pr  Pr0  1  0.125  0.125  0.625  1.0
  Pr  Pr1  1  0.125  0.125  0.125  1.0
  Pr  Pr2  1  0.625  0.125  0.125  1.0
  Pr  Pr3  1  0.125  0.625  0.125  1.0
  Ir  Ir4  1  0.625  0.625  0.625  1.0
  Ir  Ir5  1  0.125  0.625  0.625  1.0
  Ir  Ir6  1  0.625  0.125  0.625  1.0
  Ir  Ir7  1  0.625  0.625  0.125  1.0
  O  O8  1  0.956  0.544  0.544  1.0
  O  O9  1  0.294  0.294  0.706  1.0
  O  O10  1  0.956  0.544  0.956  1.0
  O  O11  1  0.706  0.294  0.294  1.0
  O  O12  1  0.544  0.544  0.956  1.0
  O  O13  1  0.544  0.956  0.544  1.0
  O  O14  1  0.544  0.956  0.956  1.0
  O  O15  1  0.250  0.250  0.250  1.0
  O  O16  1  0.294  0.706  0.706  1.0
  O  O17  1  0.706  0.294  0.706  1.0
  O  O18  1  0.000  0.000  0.000  1.0
  O  O19  1  0.956  0.956  0.544  1.0
  O  O20  1  0.294  0.706  0.294  1.0
  O  O21  1  0.706  0.706  0.294  1.0
[/CIF]
.