data_[Er4Cu1Ni1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Cu  1.9000  1.3500  0.8200
  Ni  1.9100  1.3500  0.7400
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [3.4091]
_cell_length_b [3.4091]
_cell_length_c [12.1996]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Er4CuNi]
_chemical_formula_sum '[Er4 Cu1 Ni1]'
_cell_volume [141.7813]
_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
[
  Er  Er0  2  0.0000  0.0000  0.3693  1
  Er  Er1  2  0.5000  0.5000  0.1410  1
  Cu  Cu2  1  0.0000  0.0000  0.0000  1
  Ni  Ni3  1  0.5000  0.5000  0.5000  1
]