The material described by Hf2AlSi crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 7-coordinate geometry to three equivalent Al(1) and four equivalent Si(1) atoms. In the second Hf site, Hf(2) is bonded in a 7-coordinate geometry to four equivalent Al(1) and three equivalent Si(1) atoms. Al(1) is bonded in a 9-coordinate geometry to three equivalent Hf(1), four equivalent Hf(2), and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to three equivalent Hf(2), four equivalent Hf(1), and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf2AlSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.385
_cell_length_b   5.385
_cell_length_c   3.828
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   138.906
_symmetry_Int_Tables_number   1
_cell_volume   72.964
_cell_formula_units_Z   1
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  0.854  0.146  0.500  1.0
  Hf  Hf1  1  0.147  0.853  0.000  1.0
  Al  Al2  1  0.578  0.422  0.500  1.0
  Si  Si3  1  0.421  0.579  0.000  1.0
[/CIF]
.
The material described by Hf2AlSi crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 7-coordinate geometry to three equivalent Al(1) and four equivalent Si(1) atoms. In the second Hf site, Hf(2) is bonded in a 7-coordinate geometry to four equivalent Al(1) and three equivalent Si(1) atoms. Al(1) is bonded in a 9-coordinate geometry to three equivalent Hf(1), four equivalent Hf(2), and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to three equivalent Hf(2), four equivalent Hf(1), and two equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf2AlSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.385
_cell_length_b   5.385
_cell_length_c   3.828
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   138.906
_symmetry_Int_Tables_number   1
_cell_volume   72.964
_cell_formula_units_Z   1
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  0.854  0.146  0.500  1.0
  Hf  Hf1  1  0.147  0.853  0.000  1.0
  Al  Al2  1  0.578  0.422  0.500  1.0
  Si  Si3  1  0.421  0.579  0.000  1.0
[/CIF]
.