data_[Sr2Fe4Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Fe  1.8300  1.4000  0.8525
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [12.1127]
_cell_length_b [3.9629]
_cell_length_c [18.7375]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [SrFe2Se3]
_chemical_formula_sum '[Sr2 Fe4 Se6]'
_cell_volume [899.4384]
_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
[
  Sr  Sr0  2  0.4073  0.5000  0.4199  1
  Fe  Fe1  2  0.0526  0.5000  0.5407  1
  Fe  Fe2  2  0.1680  0.0000  0.4908  1
  Se  Se3  2  0.0931  0.0000  0.6087  1
  Se  Se4  2  0.1202  0.5000  0.4093  1
  Se  Se5  2  0.3552  0.0000  0.5305  1
]