data_[Sr4Si4Sn4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Si  1.9000  1.1000  0.5400
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.9157]
_cell_length_b [9.2472]
_cell_length_c [7.3169]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.6383]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [SrSiSnO5]
_chemical_formula_sum '[Sr4 Si4 Sn4 O20]'
_cell_volume [428.6591]
_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
[
  Sr  Sr0  4  0.0000  0.3386  0.2500  1
  Si  Si1  4  0.0000  0.3143  0.7500  1
  Sn  Sn2  4  0.0000  0.0000  0.0000  1
  O  O3  8  0.1001  0.2117  0.6224  1
  O  O4  8  0.1787  0.4249  0.9074  1
  O  O5  4  0.0000  0.0801  0.2500  1
]