data_[Be4S4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Be  1.5700  1.0500  0.5900
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [P4_2/mnm]
_cell_length_a [5.9192]
_cell_length_b [5.9192]
_cell_length_c [3.4625]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [136]
_chemical_formula_structural [BeS]
_chemical_formula_sum '[Be4 S4]'
_cell_volume [121.3151]
_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
[
  Be  Be0  4  0.1690  0.1690  0.5000  1.0
  S  S1  4  0.1909  0.8091  0.5000  1.0
]