The structure described by MgHo2Se4 is Spinel structured and crystallizes in the cubic Fd-3m space group. Mg(1) is bonded to four equivalent Se(1) atoms to form MgSe4 tetrahedra that share corners with twelve equivalent Ho(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 56°. Ho(1) is bonded to six equivalent Se(1) atoms to form HoSe6 octahedra that share corners with six equivalent Mg(1)Se4 tetrahedra and edges with six equivalent Ho(1)Se6 octahedra. Se(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1) and three equivalent Ho(1) atoms. is represented by the CIF file [CIF]
data_Ho2MgSe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.187
_cell_length_b   8.187
_cell_length_c   8.187
_cell_angle_alpha   59.999
_cell_angle_beta   59.999
_cell_angle_gamma   59.999
_symmetry_Int_Tables_number   1
_cell_volume   388.016
_cell_formula_units_Z   2
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  0.125  0.625  0.625  1.0
  Ho  Ho1  1  0.625  0.125  0.625  1.0
  Ho  Ho2  1  0.625  0.625  0.125  1.0
  Ho  Ho3  1  0.625  0.625  0.625  1.0
  Mg  Mg4  1  0.250  0.250  0.250  1.0
  Mg  Mg5  1  0.000  0.000  0.000  1.0
  Se  Se6  1  0.861  0.380  0.380  1.0
  Se  Se7  1  0.380  0.861  0.380  1.0
  Se  Se8  1  0.380  0.380  0.861  1.0
  Se  Se9  1  0.380  0.380  0.380  1.0
  Se  Se10  1  0.389  0.870  0.870  1.0
  Se  Se11  1  0.870  0.389  0.870  1.0
  Se  Se12  1  0.870  0.870  0.389  1.0
  Se  Se13  1  0.870  0.870  0.870  1.0
[/CIF]
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The structure described by MgHo2Se4 is Spinel structured and crystallizes in the cubic Fd-3m space group. Mg(1) is bonded to four equivalent Se(1) atoms to form MgSe4 tetrahedra that share corners with twelve equivalent Ho(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 56°. Ho(1) is bonded to six equivalent Se(1) atoms to form HoSe6 octahedra that share corners with six equivalent Mg(1)Se4 tetrahedra and edges with six equivalent Ho(1)Se6 octahedra. Se(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1) and three equivalent Ho(1) atoms. is represented by the CIF file [CIF]
data_Ho2MgSe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.187
_cell_length_b   8.187
_cell_length_c   8.187
_cell_angle_alpha   59.999
_cell_angle_beta   59.999
_cell_angle_gamma   59.999
_symmetry_Int_Tables_number   1
_cell_volume   388.016
_cell_formula_units_Z   2
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  0.125  0.625  0.625  1.0
  Ho  Ho1  1  0.625  0.125  0.625  1.0
  Ho  Ho2  1  0.625  0.625  0.125  1.0
  Ho  Ho3  1  0.625  0.625  0.625  1.0
  Mg  Mg4  1  0.250  0.250  0.250  1.0
  Mg  Mg5  1  0.000  0.000  0.000  1.0
  Se  Se6  1  0.861  0.380  0.380  1.0
  Se  Se7  1  0.380  0.861  0.380  1.0
  Se  Se8  1  0.380  0.380  0.861  1.0
  Se  Se9  1  0.380  0.380  0.380  1.0
  Se  Se10  1  0.389  0.870  0.870  1.0
  Se  Se11  1  0.870  0.389  0.870  1.0
  Se  Se12  1  0.870  0.870  0.389  1.0
  Se  Se13  1  0.870  0.870  0.870  1.0
[/CIF]
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