data_[Be2Si2Br4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Be  1.5700  1.0500  0.5900
  Si  1.9000  1.1000  0.5400
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [13.9671]
_cell_length_b [3.3034]
_cell_length_c [5.8309]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.1140]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [BeSiBr2]
_chemical_formula_sum '[Be2 Si2 Br4]'
_cell_volume [257.1220]
_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
[
  Be  Be0  2  0.2827  0.0000  0.7689  1
  Si  Si1  2  0.1443  0.5000  0.6031  1
  Br  Br2  2  0.1848  0.5000  0.2450  1
  Br  Br3  2  0.3883  0.5000  0.8830  1
]