data_[Mg2Bi4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.4573]
_cell_length_b [3.4030]
_cell_length_c [6.6942]
_cell_angle_alpha [90.0000]
_cell_angle_beta [114.1566]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Mg(BiO2)2]
_chemical_formula_sum '[Mg2 Bi4 O8]'
_cell_volume [217.3615]
_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
[
  Mg  Mg0  2  0.0000  0.0000  0.5000  1.0
  Bi  Bi1  4  0.2077  0.0000  0.2287  1.0
  O  O2  4  0.1210  0.5000  0.4447  1.0
  O  O3  4  0.1641  0.0000  0.8058  1.0
]