data_[Nb1Cu1As1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nb  1.6000  1.4500  0.8200
  Cu  1.9000  1.3500  0.8200
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [P4mm]
_cell_length_a [3.2469]
_cell_length_b [3.2469]
_cell_length_c [17.8690]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [99]
_chemical_formula_structural [NbCuAs]
_chemical_formula_sum '[Nb1 Cu1 As1]'
_cell_volume [188.3808]
_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
[
  Nb  Nb0  1  0.5000  0.5000  0.5069  1
  Cu  Cu1  1  0.0000  0.0000  0.4163  1
  As  As2  1  0.0000  0.0000  0.5768  1
]