The material described by HfCuSiAs is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. Hf(1) is bonded in a 8-coordinate geometry to four equivalent Si(1) and four equivalent As(1) atoms. Cu(1) is bonded in a 4-coordinate geometry to four equivalent As(1) atoms. Si(1) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Si(1) atoms. As(1) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Cu(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_HfCuSiAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.655
_cell_length_b   3.655
_cell_length_c   9.571
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   127.840
_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  0.000  0.500  0.780  1.0
  Hf  Hf1  1  0.500  0.000  0.220  1.0
  Cu  Cu2  1  0.500  0.500  0.500  1.0
  Cu  Cu3  1  0.000  0.000  0.500  1.0
  Si  Si4  1  0.500  0.500  0.000  1.0
  Si  Si5  1  0.000  0.000  0.000  1.0
  As  As6  1  0.000  0.500  0.319  1.0
  As  As7  1  0.500  0.000  0.681  1.0
[/CIF]
.
The material described by HfCuSiAs is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. Hf(1) is bonded in a 8-coordinate geometry to four equivalent Si(1) and four equivalent As(1) atoms. Cu(1) is bonded in a 4-coordinate geometry to four equivalent As(1) atoms. Si(1) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Si(1) atoms. As(1) is bonded in a 8-coordinate geometry to four equivalent Hf(1) and four equivalent Cu(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_HfCuSiAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.655
_cell_length_b   3.655
_cell_length_c   9.571
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   127.840
_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  0.000  0.500  0.780  1.0
  Hf  Hf1  1  0.500  0.000  0.220  1.0
  Cu  Cu2  1  0.500  0.500  0.500  1.0
  Cu  Cu3  1  0.000  0.000  0.500  1.0
  Si  Si4  1  0.500  0.500  0.000  1.0
  Si  Si5  1  0.000  0.000  0.000  1.0
  As  As6  1  0.000  0.500  0.319  1.0
  As  As7  1  0.500  0.000  0.681  1.0
[/CIF]
.