data_[Ta4Hg2Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ta  1.5000  1.4500  0.8200
  Hg  2.0000  1.5000  1.2450
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.3525]
_cell_length_b [3.4036]
_cell_length_c [10.8197]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.0666]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Ta2HgSe6]
_chemical_formula_sum '[Ta4 Hg2 Se12]'
_cell_volume [452.4096]
_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
[
  Ta  Ta0  4  0.2073  0.5000  0.3014  1
  Hg  Hg1  2  0.0000  0.0000  0.0000  1
  Se  Se2  4  0.0412  0.0000  0.2550  1
  Se  Se3  4  0.1565  0.5000  0.5288  1
  Se  Se4  4  0.2459  0.5000  0.8473  1
]