The structure described by HoSi2 is hexagonal omega structure-like structured and crystallizes in the tetragonal I4_1/amd space group. Ho(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of face and edge-sharing HoSi12 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to six equivalent Ho(1) and three equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_HoSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.864
_cell_length_b   7.864
_cell_length_c   7.864
_cell_angle_alpha   150.903
_cell_angle_beta   150.903
_cell_angle_gamma   41.617
_symmetry_Int_Tables_number   1
_cell_volume   114.747
_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  0.250  0.750  0.500  1.0
  Ho  Ho1  1  0.500  0.500  0.000  1.0
  Si  Si2  1  0.832  0.332  0.500  1.0
  Si  Si3  1  0.918  0.918  0.000  1.0
  Si  Si4  1  0.668  0.168  0.500  1.0
  Si  Si5  1  0.082  0.082  0.000  1.0
[/CIF]
.
The structure described by HoSi2 is hexagonal omega structure-like structured and crystallizes in the tetragonal I4_1/amd space group. Ho(1) is bonded to twelve equivalent Si(1) atoms to form a mixture of face and edge-sharing HoSi12 cuboctahedra. Si(1) is bonded in a 9-coordinate geometry to six equivalent Ho(1) and three equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_HoSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.864
_cell_length_b   7.864
_cell_length_c   7.864
_cell_angle_alpha   150.903
_cell_angle_beta   150.903
_cell_angle_gamma   41.617
_symmetry_Int_Tables_number   1
_cell_volume   114.747
_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  0.250  0.750  0.500  1.0
  Ho  Ho1  1  0.500  0.500  0.000  1.0
  Si  Si2  1  0.832  0.332  0.500  1.0
  Si  Si3  1  0.918  0.918  0.000  1.0
  Si  Si4  1  0.668  0.168  0.500  1.0
  Si  Si5  1  0.082  0.082  0.000  1.0
[/CIF]
.