The crystal structure described by HoMnO3 crystallizes in the orthorhombic Pnma space group. Ho(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of edge and corner-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. Mn(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to four equivalent Ho(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Ho(1) and two equivalent Mn(1) atoms. is represented by the CIF card [CIF]
data_HoMnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.976
_cell_length_b   13.075
_cell_length_c   3.375
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   263.688
_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  0.689  0.250  0.759  1.0
  Ho  Ho1  1  0.189  0.250  0.741  1.0
  Ho  Ho2  1  0.311  0.750  0.241  1.0
  Ho  Ho3  1  0.811  0.750  0.259  1.0
  Mn  Mn4  1  0.500  0.000  0.500  1.0
  Mn  Mn5  1  0.000  0.500  0.000  1.0
  Mn  Mn6  1  0.500  0.500  0.500  1.0
  Mn  Mn7  1  0.000  0.000  0.000  1.0
  O  O8  1  0.949  0.250  0.245  1.0
  O  O9  1  0.449  0.250  0.255  1.0
  O  O10  1  0.051  0.750  0.755  1.0
  O  O11  1  0.551  0.750  0.745  1.0
  O  O12  1  0.738  0.078  0.777  1.0
  O  O13  1  0.238  0.422  0.723  1.0
  O  O14  1  0.262  0.578  0.223  1.0
  O  O15  1  0.762  0.922  0.277  1.0
  O  O16  1  0.262  0.922  0.223  1.0
  O  O17  1  0.762  0.578  0.277  1.0
  O  O18  1  0.738  0.422  0.777  1.0
  O  O19  1  0.238  0.078  0.723  1.0
[/CIF]
.
The crystal structure described by HoMnO3 crystallizes in the orthorhombic Pnma space group. Ho(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of edge and corner-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. Mn(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to four equivalent Ho(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Ho(1) and two equivalent Mn(1) atoms. is represented by the CIF card [CIF]
data_HoMnO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.976
_cell_length_b   13.075
_cell_length_c   3.375
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   263.688
_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  0.689  0.250  0.759  1.0
  Ho  Ho1  1  0.189  0.250  0.741  1.0
  Ho  Ho2  1  0.311  0.750  0.241  1.0
  Ho  Ho3  1  0.811  0.750  0.259  1.0
  Mn  Mn4  1  0.500  0.000  0.500  1.0
  Mn  Mn5  1  0.000  0.500  0.000  1.0
  Mn  Mn6  1  0.500  0.500  0.500  1.0
  Mn  Mn7  1  0.000  0.000  0.000  1.0
  O  O8  1  0.949  0.250  0.245  1.0
  O  O9  1  0.449  0.250  0.255  1.0
  O  O10  1  0.051  0.750  0.755  1.0
  O  O11  1  0.551  0.750  0.745  1.0
  O  O12  1  0.738  0.078  0.777  1.0
  O  O13  1  0.238  0.422  0.723  1.0
  O  O14  1  0.262  0.578  0.223  1.0
  O  O15  1  0.762  0.922  0.277  1.0
  O  O16  1  0.262  0.922  0.223  1.0
  O  O17  1  0.762  0.578  0.277  1.0
  O  O18  1  0.738  0.422  0.777  1.0
  O  O19  1  0.238  0.078  0.723  1.0
[/CIF]
.