data_[Er4Be2Si2C2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Be  1.5700  1.0500  0.5900
  Si  1.9000  1.1000  0.5400
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.2626]
_cell_length_b [3.6949]
_cell_length_c [7.8302]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.7058]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Er2BeSiC]
_chemical_formula_sum '[Er4 Be2 Si2 C2]'
_cell_volume [172.6062]
_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
[
  Er  Er0  2  0.1992  0.2500  0.3878  1.0
  Er  Er1  2  0.2159  0.2500  0.9660  1.0
  Be  Be2  2  0.4565  0.7500  0.2479  1.0
  Si  Si3  2  0.3279  0.7500  0.7012  1.0
  C  C4  2  0.1738  0.7500  0.1741  1.0
]