data_[Tl4Si2Ni2Te8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Si  1.9000  1.1000  0.5400
  Ni  1.9100  1.3500  0.7400
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [I-42m]
_cell_length_a [8.4670]
_cell_length_b [8.4670]
_cell_length_c [6.9494]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [121]
_chemical_formula_structural [Tl2SiNiTe4]
_chemical_formula_sum '[Tl4 Si2 Ni2 Te8]'
_cell_volume [498.1965]
_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
[
  Tl  Tl0  4  0.0000  0.5000  0.0000  1
  Si  Si1  2  0.0000  0.0000  0.5000  1
  Ni  Ni2  2  0.0000  0.0000  0.0000  1
  Te  Te3  8  0.1576  0.1576  0.2533  1
]