The material described by Ca3Fe2(RhO6)2 crystallizes in the trigonal R32 space group. Ca(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to six equivalent O(2) atoms to form distorted FeO6 pentagonal pyramids that share faces with two equivalent Rh(1)O6 octahedra. In the second Fe site, Fe(2) is bonded to six equivalent O(1) atoms to form distorted FeO6 pentagonal pyramids that share faces with two equivalent Rh(1)O6 octahedra. Rh(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form RhO6 octahedra that share  a faceface with one Fe(1)O6 pentagonal pyramid and  a faceface with one Fe(2)O6 pentagonal pyramid. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Ca(1), one Fe(2), and one Rh(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ca(1), one Fe(1), and one Rh(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca3Fe2(RhO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.395
_cell_length_b   6.395
_cell_length_c   6.395
_cell_angle_alpha   92.540
_cell_angle_beta   92.540
_cell_angle_gamma   92.540
_symmetry_Int_Tables_number   1
_cell_volume   260.684
_cell_formula_units_Z   1
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
  Ca  Ca0  1  0.373  0.627  0.000  1.0
  Ca  Ca1  1  0.000  0.373  0.627  1.0
  Ca  Ca2  1  0.627  0.000  0.373  1.0
  Fe  Fe3  1  0.500  0.500  0.500  1.0
  Fe  Fe4  1  0.000  0.000  0.000  1.0
  Rh  Rh5  1  0.245  0.245  0.245  1.0
  Rh  Rh6  1  0.755  0.755  0.755  1.0
  O  O7  1  0.847  0.045  0.712  1.0
  O  O8  1  0.712  0.847  0.045  1.0
  O  O9  1  0.045  0.712  0.847  1.0
  O  O10  1  0.153  0.288  0.955  1.0
  O  O11  1  0.955  0.153  0.288  1.0
  O  O12  1  0.288  0.955  0.153  1.0
  O  O13  1  0.649  0.458  0.769  1.0
  O  O14  1  0.769  0.649  0.458  1.0
  O  O15  1  0.458  0.769  0.649  1.0
  O  O16  1  0.351  0.231  0.542  1.0
  O  O17  1  0.231  0.542  0.351  1.0
  O  O18  1  0.542  0.351  0.231  1.0
[/CIF]
.
The material described by Ca3Fe2(RhO6)2 crystallizes in the trigonal R32 space group. Ca(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to six equivalent O(2) atoms to form distorted FeO6 pentagonal pyramids that share faces with two equivalent Rh(1)O6 octahedra. In the second Fe site, Fe(2) is bonded to six equivalent O(1) atoms to form distorted FeO6 pentagonal pyramids that share faces with two equivalent Rh(1)O6 octahedra. Rh(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form RhO6 octahedra that share  a faceface with one Fe(1)O6 pentagonal pyramid and  a faceface with one Fe(2)O6 pentagonal pyramid. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Ca(1), one Fe(2), and one Rh(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ca(1), one Fe(1), and one Rh(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca3Fe2(RhO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.395
_cell_length_b   6.395
_cell_length_c   6.395
_cell_angle_alpha   92.540
_cell_angle_beta   92.540
_cell_angle_gamma   92.540
_symmetry_Int_Tables_number   1
_cell_volume   260.684
_cell_formula_units_Z   1
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
  Ca  Ca0  1  0.373  0.627  0.000  1.0
  Ca  Ca1  1  0.000  0.373  0.627  1.0
  Ca  Ca2  1  0.627  0.000  0.373  1.0
  Fe  Fe3  1  0.500  0.500  0.500  1.0
  Fe  Fe4  1  0.000  0.000  0.000  1.0
  Rh  Rh5  1  0.245  0.245  0.245  1.0
  Rh  Rh6  1  0.755  0.755  0.755  1.0
  O  O7  1  0.847  0.045  0.712  1.0
  O  O8  1  0.712  0.847  0.045  1.0
  O  O9  1  0.045  0.712  0.847  1.0
  O  O10  1  0.153  0.288  0.955  1.0
  O  O11  1  0.955  0.153  0.288  1.0
  O  O12  1  0.288  0.955  0.153  1.0
  O  O13  1  0.649  0.458  0.769  1.0
  O  O14  1  0.769  0.649  0.458  1.0
  O  O15  1  0.458  0.769  0.649  1.0
  O  O16  1  0.351  0.231  0.542  1.0
  O  O17  1  0.231  0.542  0.351  1.0
  O  O18  1  0.542  0.351  0.231  1.0
[/CIF]
.