data_[Al2Si2S8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Al  1.6100  1.2500  0.6750
  Si  1.9000  1.1000  0.5400
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [P222]
_cell_length_a [5.7072]
_cell_length_b [5.7237]
_cell_length_c [11.4914]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [16]
_chemical_formula_structural [AlSiS4]
_chemical_formula_sum '[Al2 Si2 S8]'
_cell_volume [375.3807]
_cell_formula_units_Z [2]
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  1  0.0000  0.0000  0.0000  1
  Al  Al1  1  0.5000  0.0000  0.5000  1
  Si  Si2  1  0.0000  0.0000  0.5000  1
  Si  Si3  1  0.0000  0.5000  0.0000  1
  S  S4  4  0.2083  0.2678  0.1023  1
  S  S5  4  0.2326  0.2077  0.6026  1
]