data_[Pm2Ni2Cl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ni  1.9100  1.3500  0.7400
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [11.9461]
_cell_length_b [3.7163]
_cell_length_c [19.7734]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [PmNiCl4]
_chemical_formula_sum '[Pm2 Ni2 Cl8]'
_cell_volume [877.8369]
_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  0.3235  0.2500  0.0218  1
  Ni  Ni1  2  0.1201  0.7500  0.9809  1
  Cl  Cl2  2  0.0907  0.2500  0.0587  1
  Cl  Cl3  2  0.1767  0.2500  0.9121  1
  Cl  Cl4  2  0.3336  0.7500  0.1207  1
  Cl  Cl5  2  0.4318  0.7500  0.9392  1
]