data_[Rb8Mg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Mg  1.3100  1.5000  0.8600
]
_symmetry_space_group_name_H-M [Pa-3]
_cell_length_a [9.5029]
_cell_length_b [9.5029]
_cell_length_c [9.5029]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [205]
_chemical_formula_structural [Rb2Mg]
_chemical_formula_sum '[Rb8 Mg4]'
_cell_volume [858.1557]
_cell_formula_units_Z [4]
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
[
  Rb  Rb0  8  0.1530  0.6530  0.8470  1
  Mg  Mg1  4  0.0000  0.0000  0.0000  1
]