data_[Rb4Mn4Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Mn  1.5500  1.4000  0.6483
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [14.1709]
_cell_length_b [4.3490]
_cell_length_c [8.5435]
_cell_angle_alpha [90.0000]
_cell_angle_beta [123.6836]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Mn2Se3]
_chemical_formula_sum '[Rb4 Mn4 Se6]'
_cell_volume [438.1395]
_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  4  0.0649  0.5000  0.3443  1.0
  Mn  Mn1  4  0.1948  0.0000  0.0703  1.0
  Se  Se2  4  0.1911  0.0000  0.7595  1.0
  Se  Se3  2  0.0000  0.0000  0.0000  1.0
]