data_[La6Pm2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  La  1.1000  1.9500  1.1720
  Pm  1.1300  1.8500  1.1100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2/c]
_cell_length_a [6.2931]
_cell_length_b [7.1904]
_cell_length_c [6.2772]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.3040]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [13]
_chemical_formula_structural [La3PmO4]
_chemical_formula_sum '[La6 Pm2 O8]'
_cell_volume [268.0721]
_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
[
  La  La0  2  0.0000  0.3753  0.7500  1
  La  La1  2  0.5000  0.1250  0.7500  1
  La  La2  2  0.5000  0.3752  0.2500  1
  Pm  Pm3  2  0.0000  0.1251  0.2500  1
  O  O4  4  0.2374  0.1194  0.9982  1
  O  O5  4  0.2415  0.3691  0.4944  1
]