The crystal structure described by HfSi2 is Zirconium Disilicide structured and crystallizes in the orthorhombic Cmcm space group. Hf(1) is bonded in a 10-coordinate geometry to four equivalent Si(1) and six equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to six equivalent Hf(1) and two equivalent Si(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_HfSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.649
_cell_length_b   3.647
_cell_length_c   7.520
_cell_angle_alpha   104.032
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   97.077
_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
  Hf  Hf0  1  0.250  0.894  0.789  1.0
  Hf  Hf1  1  0.750  0.106  0.211  1.0
  Si  Si2  1  0.250  0.250  0.500  1.0
  Si  Si3  1  0.750  0.750  0.500  1.0
  Si  Si4  1  0.750  0.447  0.894  1.0
  Si  Si5  1  0.250  0.553  0.106  1.0
[/CIF]
.
The crystal structure described by HfSi2 is Zirconium Disilicide structured and crystallizes in the orthorhombic Cmcm space group. Hf(1) is bonded in a 10-coordinate geometry to four equivalent Si(1) and six equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a 8-coordinate geometry to six equivalent Hf(1) and two equivalent Si(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_HfSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.649
_cell_length_b   3.647
_cell_length_c   7.520
_cell_angle_alpha   104.032
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   97.077
_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
  Hf  Hf0  1  0.250  0.894  0.789  1.0
  Hf  Hf1  1  0.750  0.106  0.211  1.0
  Si  Si2  1  0.250  0.250  0.500  1.0
  Si  Si3  1  0.750  0.750  0.500  1.0
  Si  Si4  1  0.750  0.447  0.894  1.0
  Si  Si5  1  0.250  0.553  0.106  1.0
[/CIF]
.