The crystal structure described by Ho2EuO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one O(1), two equivalent O(2), and three equivalent O(4) atoms to form a mixture of edge and corner-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 51-64°. In the second Ho site, Ho(2) is bonded to one O(2), two equivalent O(1), and three equivalent O(3) atoms to form a mixture of edge and corner-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 51-64°. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ho(1), two equivalent Ho(2), and two equivalent Eu(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ho(2), two equivalent Ho(1), and two equivalent Eu(1) atoms. In the third O site, O(3) is bonded to three equivalent Ho(2) and two equivalent Eu(1) atoms to form a mixture of distorted edge and corner-sharing OEu2Ho3 trigonal bipyramids. In the fourth O site, O(4) is bonded to three equivalent Ho(1) and two equivalent Eu(1) atoms to form a mixture of edge and corner-sharing OEu2Ho3 square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuHo2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.401
_cell_length_b   10.019
_cell_length_c   11.913
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   405.998
_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
  Eu  Eu0  1  0.250  0.749  0.149  1.0
  Eu  Eu1  1  0.750  0.251  0.851  1.0
  Eu  Eu2  1  0.750  0.751  0.649  1.0
  Eu  Eu3  1  0.250  0.249  0.351  1.0
  Ho  Ho4  1  0.250  0.576  0.889  1.0
  Ho  Ho5  1  0.750  0.424  0.111  1.0
  Ho  Ho6  1  0.750  0.924  0.389  1.0
  Ho  Ho7  1  0.250  0.076  0.611  1.0
  Ho  Ho8  1  0.250  0.079  0.112  1.0
  Ho  Ho9  1  0.750  0.921  0.888  1.0
  Ho  Ho10  1  0.750  0.421  0.612  1.0
  Ho  Ho11  1  0.250  0.579  0.388  1.0
  O  O12  1  0.250  0.788  0.824  1.0
  O  O13  1  0.750  0.212  0.176  1.0
  O  O14  1  0.750  0.712  0.324  1.0
  O  O15  1  0.250  0.288  0.676  1.0
  O  O16  1  0.250  0.986  0.283  1.0
  O  O17  1  0.750  0.014  0.717  1.0
  O  O18  1  0.750  0.514  0.783  1.0
  O  O19  1  0.250  0.486  0.217  1.0
  O  O20  1  0.250  0.576  0.578  1.0
  O  O21  1  0.750  0.424  0.422  1.0
  O  O22  1  0.750  0.924  0.078  1.0
  O  O23  1  0.250  0.076  0.922  1.0
  O  O24  1  0.250  0.873  0.520  1.0
  O  O25  1  0.750  0.127  0.480  1.0
  O  O26  1  0.750  0.627  0.020  1.0
  O  O27  1  0.250  0.373  0.980  1.0
[/CIF]
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The crystal structure described by Ho2EuO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one O(1), two equivalent O(2), and three equivalent O(4) atoms to form a mixture of edge and corner-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 51-64°. In the second Ho site, Ho(2) is bonded to one O(2), two equivalent O(1), and three equivalent O(3) atoms to form a mixture of edge and corner-sharing HoO6 octahedra. The corner-sharing octahedral tilt angles range from 51-64°. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Ho(1), two equivalent Ho(2), and two equivalent Eu(1) atoms. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ho(2), two equivalent Ho(1), and two equivalent Eu(1) atoms. In the third O site, O(3) is bonded to three equivalent Ho(2) and two equivalent Eu(1) atoms to form a mixture of distorted edge and corner-sharing OEu2Ho3 trigonal bipyramids. In the fourth O site, O(4) is bonded to three equivalent Ho(1) and two equivalent Eu(1) atoms to form a mixture of edge and corner-sharing OEu2Ho3 square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_EuHo2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.401
_cell_length_b   10.019
_cell_length_c   11.913
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   405.998
_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
  Eu  Eu0  1  0.250  0.749  0.149  1.0
  Eu  Eu1  1  0.750  0.251  0.851  1.0
  Eu  Eu2  1  0.750  0.751  0.649  1.0
  Eu  Eu3  1  0.250  0.249  0.351  1.0
  Ho  Ho4  1  0.250  0.576  0.889  1.0
  Ho  Ho5  1  0.750  0.424  0.111  1.0
  Ho  Ho6  1  0.750  0.924  0.389  1.0
  Ho  Ho7  1  0.250  0.076  0.611  1.0
  Ho  Ho8  1  0.250  0.079  0.112  1.0
  Ho  Ho9  1  0.750  0.921  0.888  1.0
  Ho  Ho10  1  0.750  0.421  0.612  1.0
  Ho  Ho11  1  0.250  0.579  0.388  1.0
  O  O12  1  0.250  0.788  0.824  1.0
  O  O13  1  0.750  0.212  0.176  1.0
  O  O14  1  0.750  0.712  0.324  1.0
  O  O15  1  0.250  0.288  0.676  1.0
  O  O16  1  0.250  0.986  0.283  1.0
  O  O17  1  0.750  0.014  0.717  1.0
  O  O18  1  0.750  0.514  0.783  1.0
  O  O19  1  0.250  0.486  0.217  1.0
  O  O20  1  0.250  0.576  0.578  1.0
  O  O21  1  0.750  0.424  0.422  1.0
  O  O22  1  0.750  0.924  0.078  1.0
  O  O23  1  0.250  0.076  0.922  1.0
  O  O24  1  0.250  0.873  0.520  1.0
  O  O25  1  0.750  0.127  0.480  1.0
  O  O26  1  0.750  0.627  0.020  1.0
  O  O27  1  0.250  0.373  0.980  1.0
[/CIF]
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