The material structure described by HfFeAs crystallizes in the orthorhombic Pnma space group. Hf(1) is bonded in a 11-coordinate geometry to six equivalent Fe(1) and five equivalent As(1) atoms. Fe(1) is bonded in a 4-coordinate geometry to six equivalent Hf(1) and four equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to five equivalent Hf(1) and four equivalent Fe(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_HfFeAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.878
_cell_length_b   6.369
_cell_length_c   7.243
_cell_angle_alpha   90.007
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   178.894
_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
  Hf  Hf0  1  0.250  0.484  0.188  1.0
  Hf  Hf1  1  0.750  0.516  0.812  1.0
  Hf  Hf2  1  0.750  0.016  0.688  1.0
  Hf  Hf3  1  0.250  0.984  0.312  1.0
  Fe  Fe4  1  0.250  0.851  0.938  1.0
  Fe  Fe5  1  0.750  0.149  0.062  1.0
  Fe  Fe6  1  0.750  0.649  0.438  1.0
  Fe  Fe7  1  0.250  0.351  0.562  1.0
  As  As8  1  0.250  0.725  0.617  1.0
  As  As9  1  0.750  0.275  0.383  1.0
  As  As10  1  0.750  0.775  0.117  1.0
  As  As11  1  0.250  0.225  0.883  1.0
[/CIF]
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The material structure described by HfFeAs crystallizes in the orthorhombic Pnma space group. Hf(1) is bonded in a 11-coordinate geometry to six equivalent Fe(1) and five equivalent As(1) atoms. Fe(1) is bonded in a 4-coordinate geometry to six equivalent Hf(1) and four equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to five equivalent Hf(1) and four equivalent Fe(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_HfFeAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.878
_cell_length_b   6.369
_cell_length_c   7.243
_cell_angle_alpha   90.007
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   178.894
_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
  Hf  Hf0  1  0.250  0.484  0.188  1.0
  Hf  Hf1  1  0.750  0.516  0.812  1.0
  Hf  Hf2  1  0.750  0.016  0.688  1.0
  Hf  Hf3  1  0.250  0.984  0.312  1.0
  Fe  Fe4  1  0.250  0.851  0.938  1.0
  Fe  Fe5  1  0.750  0.149  0.062  1.0
  Fe  Fe6  1  0.750  0.649  0.438  1.0
  Fe  Fe7  1  0.250  0.351  0.562  1.0
  As  As8  1  0.250  0.725  0.617  1.0
  As  As9  1  0.750  0.275  0.383  1.0
  As  As10  1  0.750  0.775  0.117  1.0
  As  As11  1  0.250  0.225  0.883  1.0
[/CIF]
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