data_[Mg4Be4S4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Be  1.5700  1.0500  0.5900
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [7.5049]
_cell_length_b [8.0498]
_cell_length_c [3.3843]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [MgBeS]
_chemical_formula_sum '[Mg4 Be4 S4]'
_cell_volume [204.4521]
_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
[
  Mg  Mg0  4  0.2498  0.0000  0.5000  1
  Be  Be1  4  0.0000  0.1296  0.0000  1
  S  S2  4  0.0000  0.2773  0.5000  1
]