data_[Pm4Cr2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Cr  1.6600  1.4000  0.9400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [5.3153]
_cell_length_b [6.1104]
_cell_length_c [8.7024]
_cell_angle_alpha [90.0000]
_cell_angle_beta [122.7583]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [Pm2CrO6]
_chemical_formula_sum '[Pm4 Cr2 O12]'
_cell_volume [237.6892]
_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  4  0.2179  0.5976  0.2526  1
  Cr  Cr1  2  0.5000  0.0000  0.5000  1
  O  O2  4  0.1584  0.6466  0.9526  1
  O  O3  4  0.3021  0.2299  0.9375  1
  O  O4  4  0.3849  0.5422  0.7637  1
]