data_[Al8Sn4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Al  1.6100  1.2500  0.6750
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.6683]
_cell_length_b [9.6969]
_cell_length_c [10.1854]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Al2SnO5]
_chemical_formula_sum '[Al8 Sn4 O20]'
_cell_volume [362.3002]
_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
[
  Al  Al0  8  0.0000  0.1363  0.5526  1
  Sn  Sn1  4  0.0000  0.1850  0.2500  1
  O  O2  8  0.0000  0.0431  0.1088  1
  O  O3  8  0.0000  0.3095  0.0657  1
  O  O4  4  0.0000  0.2219  0.7500  1
]