data_[Li4Si2Sn2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Si  1.9000  1.1000  0.5400
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [8.4934]
_cell_length_b [9.6071]
_cell_length_c [6.2756]
_cell_angle_alpha [90.0000]
_cell_angle_beta [129.7663]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [Li2SiSnSe4]
_chemical_formula_sum '[Li4 Si2 Sn2 Se8]'
_cell_volume [393.6087]
_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
[
  Li  Li0  4  0.4993  0.2534  0.4937  1.0
  Si  Si1  2  0.0109  0.5000  0.0179  1.0
  Sn  Sn2  2  0.4414  0.5000  0.9461  1.0
  Se  Se3  4  0.3440  0.1954  0.9888  1.0
  Se  Se4  2  0.0114  0.5000  0.6498  1.0
  Se  Se5  2  0.3497  0.5000  0.4212  1.0
]