data_[Rb4Pm2Cu4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Pm  1.1300  1.8500  1.1100
  Cu  1.9000  1.3500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.6652]
_cell_length_b [3.5526]
_cell_length_c [6.6784]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.2421]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Pm(CuO2)2]
_chemical_formula_sum '[Rb4 Pm2 Cu4 O8]'
_cell_volume [309.6491]
_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
[
  Rb  Rb0  4  0.1308  0.0000  0.5576  1
  Pm  Pm1  2  0.0000  0.0000  0.0000  1
  Cu  Cu2  4  0.1798  0.5000  0.0236  1
  O  O3  4  0.0339  0.5000  0.7949  1
  O  O4  4  0.1899  0.0000  0.1512  1
]