The structure described by HoCr2O2 crystallizes in the tetragonal I4_1/amd space group. Ho(1) is bonded in a linear geometry to two equivalent O(1) atoms. Cr(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. O(1) is bonded in a distorted rectangular see-saw-like geometry to one Ho(1) and three equivalent Cr(1) atoms. is represented by the CIF file [CIF]
data_HoCr2O2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.915
_cell_length_b   7.915
_cell_length_c   7.915
_cell_angle_alpha   111.414
_cell_angle_beta   111.414
_cell_angle_gamma   105.651
_symmetry_Int_Tables_number   1
_cell_volume   380.392
_cell_formula_units_Z   4
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
  Ho  Ho0  1  0.875  0.125  0.250  1.0
  Ho  Ho1  1  0.875  0.625  0.750  1.0
  Ho  Ho2  1  0.375  0.125  0.250  1.0
  Ho  Ho3  1  0.875  0.125  0.750  1.0
  Cr  Cr4  1  0.517  0.212  0.695  1.0
  Cr  Cr5  1  0.517  0.822  0.305  1.0
  Cr  Cr6  1  0.572  0.767  0.805  1.0
  Cr  Cr7  1  0.233  0.428  0.195  1.0
  Cr  Cr8  1  0.233  0.038  0.805  1.0
  Cr  Cr9  1  0.962  0.767  0.195  1.0
  Cr  Cr10  1  0.178  0.483  0.695  1.0
  Cr  Cr11  1  0.788  0.483  0.305  1.0
  O  O12  1  0.672  0.518  0.847  1.0
  O  O13  1  0.672  0.825  0.153  1.0
  O  O14  1  0.575  0.922  0.653  1.0
  O  O15  1  0.078  0.425  0.347  1.0
  O  O16  1  0.078  0.732  0.653  1.0
  O  O17  1  0.268  0.922  0.347  1.0
  O  O18  1  0.175  0.328  0.847  1.0
  O  O19  1  0.482  0.328  0.153  1.0
[/CIF]
.
The structure described by HoCr2O2 crystallizes in the tetragonal I4_1/amd space group. Ho(1) is bonded in a linear geometry to two equivalent O(1) atoms. Cr(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. O(1) is bonded in a distorted rectangular see-saw-like geometry to one Ho(1) and three equivalent Cr(1) atoms. is represented by the CIF file [CIF]
data_HoCr2O2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.915
_cell_length_b   7.915
_cell_length_c   7.915
_cell_angle_alpha   111.414
_cell_angle_beta   111.414
_cell_angle_gamma   105.651
_symmetry_Int_Tables_number   1
_cell_volume   380.392
_cell_formula_units_Z   4
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
  Ho  Ho0  1  0.875  0.125  0.250  1.0
  Ho  Ho1  1  0.875  0.625  0.750  1.0
  Ho  Ho2  1  0.375  0.125  0.250  1.0
  Ho  Ho3  1  0.875  0.125  0.750  1.0
  Cr  Cr4  1  0.517  0.212  0.695  1.0
  Cr  Cr5  1  0.517  0.822  0.305  1.0
  Cr  Cr6  1  0.572  0.767  0.805  1.0
  Cr  Cr7  1  0.233  0.428  0.195  1.0
  Cr  Cr8  1  0.233  0.038  0.805  1.0
  Cr  Cr9  1  0.962  0.767  0.195  1.0
  Cr  Cr10  1  0.178  0.483  0.695  1.0
  Cr  Cr11  1  0.788  0.483  0.305  1.0
  O  O12  1  0.672  0.518  0.847  1.0
  O  O13  1  0.672  0.825  0.153  1.0
  O  O14  1  0.575  0.922  0.653  1.0
  O  O15  1  0.078  0.425  0.347  1.0
  O  O16  1  0.078  0.732  0.653  1.0
  O  O17  1  0.268  0.922  0.347  1.0
  O  O18  1  0.175  0.328  0.847  1.0
  O  O19  1  0.482  0.328  0.153  1.0
[/CIF]
.