data_[Tb3Ce1Er7]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tb  1.1000  1.7500  0.9815
  Ce  1.1200  1.8500  1.0800
  Er  1.2400  1.7500  1.0300
]
_symmetry_space_group_name_H-M [P3m1]
_cell_length_a [6.9728]
_cell_length_b [6.9728]
_cell_length_c [8.5567]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [156]
_chemical_formula_structural [Tb3CeEr7]
_chemical_formula_sum '[Tb3 Ce1 Er7]'
_cell_volume [360.2865]
_cell_formula_units_Z [1]
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
[
  Tb  Tb0  3  0.3306  0.1653  0.2181  1
  Ce  Ce1  1  0.0000  0.0000  0.5523  1
  Er  Er2  3  0.1646  0.8354  0.8799  1
  Er  Er3  3  0.5005  0.0009  0.5521  1
  Er  Er4  1  0.6667  0.3333  0.8822  1
]