The compound described by EuHo2Se4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Se(1), two equivalent Se(3), and three equivalent Se(2) atoms to form a mixture of corner and edge-sharing HoSe6 octahedra. The corner-sharing octahedral tilt angles range from 47-64°. In the second Ho site, Ho(2) is bonded to one Se(3), two equivalent Se(1), and three equivalent Se(4) atoms to form a mixture of corner and edge-sharing HoSe6 octahedra. The corner-sharing octahedral tilt angles range from 47-64°. Eu(1) is bonded in a 8-coordinate geometry to two equivalent Se(1), two equivalent Se(2), two equivalent Se(3), and two equivalent Se(4) atoms. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded to one Ho(1), two equivalent Ho(2), and two equivalent Eu(1) atoms to form a mixture of distorted corner and edge-sharing SeEu2Ho3 trigonal bipyramids. In the second Se site, Se(2) is bonded to three equivalent Ho(1) and two equivalent Eu(1) atoms to form a mixture of corner and edge-sharing SeEu2Ho3 square pyramids. In the third Se site, Se(3) is bonded to one Ho(2), two equivalent Ho(1), and two equivalent Eu(1) atoms to form a mixture of distorted corner and edge-sharing SeEu2Ho3 trigonal bipyramids. In the fourth Se site, Se(4) is bonded to three equivalent Ho(2) and two equivalent Eu(1) atoms to form a mixture of distorted corner and edge-sharing SeEu2Ho3 trigonal bipyramids. is represented by the CIF file [CIF]
data_Eu(HoSe2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.113
_cell_length_b   12.520
_cell_length_c   14.865
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   765.370
_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  0.750  0.741  0.165  1.0
  Eu  Eu1  1  0.750  0.241  0.335  1.0
  Eu  Eu2  1  0.250  0.259  0.835  1.0
  Eu  Eu3  1  0.250  0.759  0.665  1.0
  Ho  Ho4  1  0.750  0.082  0.598  1.0
  Ho  Ho5  1  0.750  0.582  0.902  1.0
  Ho  Ho6  1  0.250  0.918  0.402  1.0
  Ho  Ho7  1  0.250  0.418  0.098  1.0
  Ho  Ho8  1  0.750  0.065  0.110  1.0
  Ho  Ho9  1  0.750  0.565  0.390  1.0
  Ho  Ho10  1  0.250  0.935  0.890  1.0
  Ho  Ho11  1  0.250  0.435  0.610  1.0
  Se  Se12  1  0.750  0.293  0.675  1.0
  Se  Se13  1  0.750  0.793  0.825  1.0
  Se  Se14  1  0.250  0.707  0.325  1.0
  Se  Se15  1  0.250  0.207  0.175  1.0
  Se  Se16  1  0.750  0.368  0.970  1.0
  Se  Se17  1  0.750  0.868  0.530  1.0
  Se  Se18  1  0.250  0.632  0.030  1.0
  Se  Se19  1  0.250  0.132  0.470  1.0
  Se  Se20  1  0.750  0.975  0.284  1.0
  Se  Se21  1  0.750  0.475  0.216  1.0
  Se  Se22  1  0.250  0.025  0.716  1.0
  Se  Se23  1  0.250  0.525  0.784  1.0
  Se  Se24  1  0.750  0.090  0.921  1.0
  Se  Se25  1  0.750  0.590  0.579  1.0
  Se  Se26  1  0.250  0.910  0.079  1.0
  Se  Se27  1  0.250  0.410  0.421  1.0
[/CIF]
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The compound described by EuHo2Se4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Se(1), two equivalent Se(3), and three equivalent Se(2) atoms to form a mixture of corner and edge-sharing HoSe6 octahedra. The corner-sharing octahedral tilt angles range from 47-64°. In the second Ho site, Ho(2) is bonded to one Se(3), two equivalent Se(1), and three equivalent Se(4) atoms to form a mixture of corner and edge-sharing HoSe6 octahedra. The corner-sharing octahedral tilt angles range from 47-64°. Eu(1) is bonded in a 8-coordinate geometry to two equivalent Se(1), two equivalent Se(2), two equivalent Se(3), and two equivalent Se(4) atoms. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded to one Ho(1), two equivalent Ho(2), and two equivalent Eu(1) atoms to form a mixture of distorted corner and edge-sharing SeEu2Ho3 trigonal bipyramids. In the second Se site, Se(2) is bonded to three equivalent Ho(1) and two equivalent Eu(1) atoms to form a mixture of corner and edge-sharing SeEu2Ho3 square pyramids. In the third Se site, Se(3) is bonded to one Ho(2), two equivalent Ho(1), and two equivalent Eu(1) atoms to form a mixture of distorted corner and edge-sharing SeEu2Ho3 trigonal bipyramids. In the fourth Se site, Se(4) is bonded to three equivalent Ho(2) and two equivalent Eu(1) atoms to form a mixture of distorted corner and edge-sharing SeEu2Ho3 trigonal bipyramids. is represented by the CIF file [CIF]
data_Eu(HoSe2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.113
_cell_length_b   12.520
_cell_length_c   14.865
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   765.370
_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  0.750  0.741  0.165  1.0
  Eu  Eu1  1  0.750  0.241  0.335  1.0
  Eu  Eu2  1  0.250  0.259  0.835  1.0
  Eu  Eu3  1  0.250  0.759  0.665  1.0
  Ho  Ho4  1  0.750  0.082  0.598  1.0
  Ho  Ho5  1  0.750  0.582  0.902  1.0
  Ho  Ho6  1  0.250  0.918  0.402  1.0
  Ho  Ho7  1  0.250  0.418  0.098  1.0
  Ho  Ho8  1  0.750  0.065  0.110  1.0
  Ho  Ho9  1  0.750  0.565  0.390  1.0
  Ho  Ho10  1  0.250  0.935  0.890  1.0
  Ho  Ho11  1  0.250  0.435  0.610  1.0
  Se  Se12  1  0.750  0.293  0.675  1.0
  Se  Se13  1  0.750  0.793  0.825  1.0
  Se  Se14  1  0.250  0.707  0.325  1.0
  Se  Se15  1  0.250  0.207  0.175  1.0
  Se  Se16  1  0.750  0.368  0.970  1.0
  Se  Se17  1  0.750  0.868  0.530  1.0
  Se  Se18  1  0.250  0.632  0.030  1.0
  Se  Se19  1  0.250  0.132  0.470  1.0
  Se  Se20  1  0.750  0.975  0.284  1.0
  Se  Se21  1  0.750  0.475  0.216  1.0
  Se  Se22  1  0.250  0.025  0.716  1.0
  Se  Se23  1  0.250  0.525  0.784  1.0
  Se  Se24  1  0.750  0.090  0.921  1.0
  Se  Se25  1  0.750  0.590  0.579  1.0
  Se  Se26  1  0.250  0.910  0.079  1.0
  Se  Se27  1  0.250  0.410  0.421  1.0
[/CIF]
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