data_[Na4Ca4As8O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ca  1.0000  1.8000  1.1400
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [10.6933]
_cell_length_b [9.6522]
_cell_length_c [6.2669]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.5998]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaCa(AsO3)2]
_chemical_formula_sum '[Na4 Ca4 As8 O24]'
_cell_volume [601.4088]
_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
[
  Na  Na0  4  0.0000  0.2825  0.7500  1
  Ca  Ca1  4  0.0000  0.1014  0.2500  1
  As  As2  8  0.2047  0.4153  0.2306  1
  O  O3  8  0.1212  0.0860  0.6548  1
  O  O4  8  0.1412  0.2519  0.1657  1
  O  O5  8  0.1439  0.4953  0.4471  1
]