data_[Pm3Cr3B6O18]
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
  B  2.0400  0.8500  0.4100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [4.8712]
_cell_length_b [4.8712]
_cell_length_c [16.0619]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [PmCr(BO3)2]
_chemical_formula_sum '[Pm3 Cr3 B6 O18]'
_cell_volume [330.0636]
_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  0.5000  1
  Cr  Cr1  3  0.0000  0.0000  0.0000  1
  B  B2  6  0.0000  0.0000  0.2619  1
  O  O3  18  0.0320  0.4032  0.4084  1
]