data_[Pm3Cr6Cu3O18]
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
  Cu  1.9000  1.3500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.3374]
_cell_length_b [5.3374]
_cell_length_c [13.6143]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [PmCr2CuO6]
_chemical_formula_sum '[Pm3 Cr6 Cu3 O18]'
_cell_volume [335.8836]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.2204  1
  Cr  Cr1  3  0.0000  0.0000  0.4794  1
  Cr  Cr2  3  0.0000  0.0000  0.9892  1
  Cu  Cu3  3  0.0000  0.0000  0.6834  1
  O  O4  9  0.0075  0.3768  0.7418  1
  O  O5  9  0.0198  0.5915  0.2470  1
]