data_[Y2Er2Ni4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Y  1.2200  1.8000  1.0400
  Er  1.2400  1.7500  1.0300
  Ni  1.9100  1.3500  0.7400
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.1607]
_cell_length_b [5.4053]
_cell_length_c [7.0215]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [YErNi2]
_chemical_formula_sum '[Y2 Er2 Ni4]'
_cell_volume [157.9123]
_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
[
  Y  Y0  2  0.5000  0.3829  0.3205  1.0
  Er  Er1  2  0.0000  0.1165  0.6806  1.0
  Ni  Ni2  2  0.0000  0.3714  0.0357  1.0
  Ni  Ni3  2  0.5000  0.1211  0.9633  1.0
]