data_[Tm4As2Se2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tm  1.2500  1.7500  1.0950
  As  2.1800  1.1500  0.6600
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pmmn]
_cell_length_a [4.0396]
_cell_length_b [5.6938]
_cell_length_c [8.0962]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [59]
_chemical_formula_structural [Tm2AsSe]
_chemical_formula_sum '[Tm4 As2 Se2]'
_cell_volume [186.2186]
_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
[
  Tm  Tm0  2  0.0000  0.5000  0.1373  1
  Tm  Tm1  2  0.0000  0.5000  0.6158  1
  As  As2  2  0.0000  0.0000  0.6264  1
  Se  Se3  2  0.0000  0.0000  0.1216  1
]