data_[Ta8As4O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ta  1.5000  1.4500  0.8200
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-42d]
_cell_length_a [4.8270]
_cell_length_b [4.8270]
_cell_length_c [12.4040]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [122]
_chemical_formula_structural [Ta2AsO]
_chemical_formula_sum '[Ta8 As4 O4]'
_cell_volume [289.0140]
_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
[
  Ta  Ta0  8  0.1483  0.2500  0.6250  1
  As  As1  4  0.0000  0.0000  0.0000  1
  O  O2  4  0.0000  0.0000  0.5000  1
]