data_[Na2Mn2Bi2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mn  1.5500  1.4000  0.6483
  Bi  2.0200  1.6000  1.0350
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.8423]
_cell_length_b [4.2124]
_cell_length_c [9.3968]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.1589]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaMnBiSe3]
_chemical_formula_sum '[Na2 Mn2 Bi2 Se6]'
_cell_volume [344.5206]
_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
[
  Na  Na0  2  0.1769  0.2500  0.2132  1.0
  Mn  Mn1  2  0.0903  0.2500  0.6016  1.0
  Bi  Bi2  2  0.3418  0.7500  0.8571  1.0
  Se  Se3  2  0.1099  0.2500  0.8707  1.0
  Se  Se4  2  0.2041  0.7500  0.5020  1.0
  Se  Se5  2  0.4186  0.7500  0.1584  1.0
]