data_[Na4Tm2Sn6Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tm  1.2500  1.7500  1.0950
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.2961]
_cell_length_b [12.6515]
_cell_length_c [7.3287]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.4051]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Tm(SnSe2)3]
_chemical_formula_sum '[Na4 Tm2 Sn6 Se12]'
_cell_volume [638.0586]
_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  4  0.0000  0.3323  0.0000  1
  Tm  Tm1  2  0.0000  0.0000  0.0000  1
  Sn  Sn2  4  0.0000  0.1630  0.5000  1
  Sn  Sn3  2  0.0000  0.5000  0.5000  1
  Se  Se4  8  0.2395  0.1551  0.2417  1
  Se  Se5  4  0.2309  0.0000  0.7472  1
]