data_[Na2Sr2Bi2Te6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Bi  2.0200  1.6000  1.0350
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [9.2616]
_cell_length_b [4.6398]
_cell_length_c [10.1619]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.0372]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaSrBiTe3]
_chemical_formula_sum '[Na2 Sr2 Bi2 Te6]'
_cell_volume [419.6773]
_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  2  0.0990  0.7500  0.6008  1
  Sr  Sr1  2  0.2246  0.7500  0.2592  1
  Bi  Bi2  2  0.3132  0.2500  0.8563  1
  Te  Te3  2  0.0952  0.7500  0.9010  1
  Te  Te4  2  0.2530  0.2500  0.5046  1
  Te  Te5  2  0.4509  0.2500  0.1640  1
]