data_[K4Tb4Si8O24]
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
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [10.3542]
_cell_length_b [9.9401]
_cell_length_c [5.4650]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.6143]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [KTb(SiO3)2]
_chemical_formula_sum '[K4 Tb4 Si8 O24]'
_cell_volume [548.8917]
_cell_formula_units_Z [4]
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  4  0.0000  0.1758  0.2500  1.0
  Tb  Tb1  4  0.0000  0.3835  0.7500  1.0
  Si  Si2  8  0.2185  0.0822  0.7829  1.0
  O  O3  8  0.1194  0.4270  0.1466  1.0
  O  O4  8  0.1490  0.2274  0.7260  1.0
  O  O5  8  0.1653  0.0110  0.0222  1.0
]