data_[Rb4Na2Mn2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Mn  1.5500  1.4000  0.6483
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.0572]
_cell_length_b [6.0785]
_cell_length_c [7.9663]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.7705]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Rb2NaMnO4]
_chemical_formula_sum '[Rb4 Na2 Mn2 O8]'
_cell_volume [292.9691]
_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  0.1201  0.7500  0.1732  1
  Rb  Rb1  2  0.3047  0.2500  0.5153  1
  Na  Na2  2  0.3823  0.2500  0.0336  1
  Mn  Mn3  2  0.1965  0.7500  0.7445  1
  O  O4  4  0.3328  0.5225  0.8283  1
  O  O5  2  0.0715  0.2500  0.1916  1
  O  O6  2  0.2044  0.7500  0.5301  1
]