data_[Sr6Tb3Al21Ag6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Tb  1.1000  1.7500  0.9815
  Al  1.6100  1.2500  0.6750
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.6884]
_cell_length_b [5.6884]
_cell_length_c [27.1840]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Sr2TbAl7Ag2]
_chemical_formula_sum '[Sr6 Tb3 Al21 Ag6]'
_cell_volume [761.7628]
_cell_formula_units_Z [3]
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
[
  Sr  Sr0  6  0.0000  0.0000  0.1425  1
  Tb  Tb1  3  0.0000  0.0000  0.0000  1
  Al  Al2  18  0.0056  0.5028  0.9201  1
  Al  Al3  3  -0.0000  -0.0000  0.5000  1
  Ag  Ag4  6  0.0000  0.0000  0.3358  1
]