data_[Pm2Er4Ni4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Er  1.2400  1.7500  1.0300
  Ni  1.9100  1.3500  0.7400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.5427]
_cell_length_b [3.7879]
_cell_length_c [5.4792]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.0198]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm(ErNi)2]
_chemical_formula_sum '[Pm2 Er4 Ni4]'
_cell_volume [232.4300]
_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
[
  Pm  Pm0  2  0.0000  0.0000  0.0000  1
  Er  Er1  4  0.1492  0.5000  0.5876  1
  Ni  Ni2  4  0.2177  0.5000  0.1149  1
]