data_[Rb2Pm1Cr1Se4]
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
  Cr  1.6600  1.4000  0.9400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.1170]
_cell_length_b [4.1415]
_cell_length_c [8.3089]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.9387]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [Rb2PmCrSe4]
_chemical_formula_sum '[Rb2 Pm1 Cr1 Se4]'
_cell_volume [234.2809]
_cell_formula_units_Z [1]
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  1  0.0000  0.5000  0.5000  1
  Rb  Rb1  1  0.5000  0.0000  0.5000  1
  Pm  Pm2  1  0.0000  0.0000  0.0000  1
  Cr  Cr3  1  0.5000  0.5000  0.0000  1
  Se  Se4  2  0.2596  0.5000  0.1932  1
  Se  Se5  2  0.3022  0.0000  0.8217  1
]