data_[Sr4Er2B4O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Er  1.2400  1.7500  1.0300
  B  2.0400  0.8500  0.4100
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.2058]
_cell_length_b [5.1223]
_cell_length_c [6.6271]
_cell_angle_alpha [90.0000]
_cell_angle_beta [120.1399]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Sr2Er(BO3)2]
_chemical_formula_sum '[Sr4 Er2 B4 O12]'
_cell_volume [270.2521]
_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
[
  Sr  Sr0  4  0.2068  0.0000  0.6849  1
  Er  Er1  2  0.0000  0.0000  0.0000  1
  B  B2  4  0.0510  0.5000  0.7625  1
  O  O3  8  0.0368  0.2630  0.3054  1
  O  O4  4  0.2255  0.5000  0.8537  1
]