data_[K4Ta8O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ta  1.5000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.8738]
_cell_length_b [10.8497]
_cell_length_c [10.6975]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [KTa2O5]
_chemical_formula_sum '[K4 Ta8 O20]'
_cell_volume [449.6103]
_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  0.4055  0.7500  1
  Ta  Ta1  8  0.0000  0.1329  0.5667  1
  O  O2  8  0.0000  0.0401  0.1044  1
  O  O3  8  0.0000  0.3176  0.0420  1
  O  O4  4  0.0000  0.1646  0.7500  1
]