data_[Na2Sr6Er4Te12]
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
  Er  1.2400  1.7500  1.0300
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.8967]
_cell_length_b [13.6692]
_cell_length_c [7.9156]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.3911]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaSr3(ErTe3)2]
_chemical_formula_sum '[Na2 Sr6 Er4 Te12]'
_cell_volume [805.9506]
_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  0.0000  0.0000  0.0000  1.0
  Sr  Sr1  4  0.0000  0.1626  0.5000  1.0
  Sr  Sr2  2  0.0000  0.5000  0.5000  1.0
  Er  Er3  4  0.0000  0.3322  0.0000  1.0
  Te  Te4  8  0.2490  0.1717  0.2306  1.0
  Te  Te5  4  0.2325  0.5000  0.2266  1.0
]