data_[Rb4Cr2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cr  1.6600  1.4000  0.9400
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.8296]
_cell_length_b [6.4977]
_cell_length_c [7.7391]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.3919]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Rb2CrF4]
_chemical_formula_sum '[Rb4 Cr2 F8]'
_cell_volume [321.9131]
_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
[
  Rb  Rb0  2  0.2146  0.2500  0.4386  1
  Rb  Rb1  2  0.3262  0.2500  0.9635  1
  Cr  Cr2  2  0.2394  0.7500  0.1998  1
  F  F3  4  0.4530  0.5310  0.2522  1
  F  F4  2  0.0234  0.7500  0.9331  1
  F  F5  2  0.0314  0.7500  0.3392  1
]