The compound described by HoMn2O5 crystallizes in the orthorhombic Pbam space group. Ho(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent Mn(2)O5 square pyramids and edges with two equivalent Mn(1)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(3), two equivalent O(1), and two equivalent O(4) atoms to form MnO5 square pyramids that share corners with four equivalent Mn(1)O6 octahedra and  an edgeedge with one Mn(2)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ho(1) and two equivalent Mn(2) atoms to form a mixture of distorted edge and corner-sharing OHo2Mn2 trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Ho(1) and two equivalent Mn(1) atoms to form a mixture of distorted edge and corner-sharing OHo2Mn2 trigonal pyramids. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mn(2) and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Ho(1), one Mn(1), and one Mn(2) atom to form a mixture of distorted edge and corner-sharing OHo2Mn2 trigonal pyramids. is represented by the CIF file [CIF]
data_HoMn2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.673
_cell_length_b   7.210
_cell_length_c   8.450
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   345.599
_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  0.000  0.137  0.171  1.0
  Ho  Ho1  1  0.000  0.863  0.829  1.0
  Ho  Ho2  1  0.000  0.637  0.329  1.0
  Ho  Ho3  1  0.000  0.363  0.671  1.0
  Mn  Mn4  1  0.254  0.000  0.500  1.0
  Mn  Mn5  1  0.746  0.500  0.000  1.0
  Mn  Mn6  1  0.746  0.000  0.500  1.0
  Mn  Mn7  1  0.254  0.500  0.000  1.0
  Mn  Mn8  1  0.500  0.412  0.349  1.0
  Mn  Mn9  1  0.500  0.588  0.651  1.0
  Mn  Mn10  1  0.500  0.912  0.151  1.0
  Mn  Mn11  1  0.500  0.088  0.849  1.0
  O  O12  1  0.271  0.000  0.000  1.0
  O  O13  1  0.729  0.500  0.500  1.0
  O  O14  1  0.729  0.000  0.000  1.0
  O  O15  1  0.271  0.500  0.500  1.0
  O  O16  1  0.000  0.164  0.443  1.0
  O  O17  1  0.000  0.836  0.557  1.0
  O  O18  1  0.000  0.664  0.057  1.0
  O  O19  1  0.000  0.336  0.943  1.0
  O  O20  1  0.500  0.153  0.433  1.0
  O  O21  1  0.500  0.847  0.567  1.0
  O  O22  1  0.500  0.653  0.067  1.0
  O  O23  1  0.500  0.347  0.933  1.0
  O  O24  1  0.243  0.393  0.206  1.0
  O  O25  1  0.243  0.607  0.794  1.0
  O  O26  1  0.757  0.893  0.294  1.0
  O  O27  1  0.757  0.107  0.706  1.0
  O  O28  1  0.757  0.607  0.794  1.0
  O  O29  1  0.757  0.393  0.206  1.0
  O  O30  1  0.243  0.107  0.706  1.0
  O  O31  1  0.243  0.893  0.294  1.0
[/CIF]
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The compound described by HoMn2O5 crystallizes in the orthorhombic Pbam space group. Ho(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with four equivalent Mn(2)O5 square pyramids and edges with two equivalent Mn(1)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(3), two equivalent O(1), and two equivalent O(4) atoms to form MnO5 square pyramids that share corners with four equivalent Mn(1)O6 octahedra and  an edgeedge with one Mn(2)O5 square pyramid. The corner-sharing octahedral tilt angles range from 49-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ho(1) and two equivalent Mn(2) atoms to form a mixture of distorted edge and corner-sharing OHo2Mn2 trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Ho(1) and two equivalent Mn(1) atoms to form a mixture of distorted edge and corner-sharing OHo2Mn2 trigonal pyramids. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mn(2) and two equivalent Mn(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Ho(1), one Mn(1), and one Mn(2) atom to form a mixture of distorted edge and corner-sharing OHo2Mn2 trigonal pyramids. is represented by the CIF file [CIF]
data_HoMn2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.673
_cell_length_b   7.210
_cell_length_c   8.450
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   345.599
_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  0.000  0.137  0.171  1.0
  Ho  Ho1  1  0.000  0.863  0.829  1.0
  Ho  Ho2  1  0.000  0.637  0.329  1.0
  Ho  Ho3  1  0.000  0.363  0.671  1.0
  Mn  Mn4  1  0.254  0.000  0.500  1.0
  Mn  Mn5  1  0.746  0.500  0.000  1.0
  Mn  Mn6  1  0.746  0.000  0.500  1.0
  Mn  Mn7  1  0.254  0.500  0.000  1.0
  Mn  Mn8  1  0.500  0.412  0.349  1.0
  Mn  Mn9  1  0.500  0.588  0.651  1.0
  Mn  Mn10  1  0.500  0.912  0.151  1.0
  Mn  Mn11  1  0.500  0.088  0.849  1.0
  O  O12  1  0.271  0.000  0.000  1.0
  O  O13  1  0.729  0.500  0.500  1.0
  O  O14  1  0.729  0.000  0.000  1.0
  O  O15  1  0.271  0.500  0.500  1.0
  O  O16  1  0.000  0.164  0.443  1.0
  O  O17  1  0.000  0.836  0.557  1.0
  O  O18  1  0.000  0.664  0.057  1.0
  O  O19  1  0.000  0.336  0.943  1.0
  O  O20  1  0.500  0.153  0.433  1.0
  O  O21  1  0.500  0.847  0.567  1.0
  O  O22  1  0.500  0.653  0.067  1.0
  O  O23  1  0.500  0.347  0.933  1.0
  O  O24  1  0.243  0.393  0.206  1.0
  O  O25  1  0.243  0.607  0.794  1.0
  O  O26  1  0.757  0.893  0.294  1.0
  O  O27  1  0.757  0.107  0.706  1.0
  O  O28  1  0.757  0.607  0.794  1.0
  O  O29  1  0.757  0.393  0.206  1.0
  O  O30  1  0.243  0.107  0.706  1.0
  O  O31  1  0.243  0.893  0.294  1.0
[/CIF]
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