data_[Ag9As3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ag  1.9300  1.6000  1.0867
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.3454]
_cell_length_b [5.3454]
_cell_length_c [15.5428]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Ag3AsO6]
_chemical_formula_sum '[Ag9 As3 O18]'
_cell_volume [384.6068]
_cell_formula_units_Z [3]
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
[
  Ag  Ag0  3  0.0000  0.0000  0.3568  1.0
  Ag  Ag1  3  0.0000  0.0000  0.6347  1.0
  Ag  Ag2  3  0.0000  0.0000  0.8378  1.0
  As  As3  3  0.0000  0.0000  0.1611  1.0
  O  O4  9  0.0524  0.3632  0.7646  1.0
  O  O5  9  0.0727  0.6975  0.9053  1.0
]