data_[K4Tb2Ge2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Tb  1.1000  1.7500  0.9815
  Ge  2.0100  1.2500  0.7700
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-4]
_cell_length_a [5.8981]
_cell_length_b [5.8981]
_cell_length_c [9.1522]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [82]
_chemical_formula_structural [K2TbGeO4]
_chemical_formula_sum '[K4 Tb2 Ge2 O8]'
_cell_volume [318.3848]
_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
[
  K  K0  2  0.0000  0.0000  0.0000  1
  K  K1  2  0.0000  0.5000  0.7500  1
  Tb  Tb2  2  0.0000  0.5000  0.2500  1
  Ge  Ge3  2  0.0000  0.0000  0.5000  1
  O  O4  8  0.1308  0.2262  0.3868  1
]