data_[Ca4Be2Br2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Be  1.5700  1.0500  0.5900
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [4.9575]
_cell_length_b [3.6405]
_cell_length_c [11.7990]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [Ca2BeBr]
_chemical_formula_sum '[Ca4 Be2 Br2]'
_cell_volume [212.9421]
_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
[
  Ca  Ca0  2  0.0000  0.0000  0.9976  1
  Ca  Ca1  2  0.5000  0.0000  0.2535  1
  Be  Be2  2  0.5000  0.0000  0.5086  1
  Br  Br3  2  0.0000  0.0000  0.7402  1
]