data_[Rb2Mg12C2]
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
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [3.3750]
_cell_length_b [5.8580]
_cell_length_c [23.0415]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [RbMg6C]
_chemical_formula_sum '[Rb2 Mg12 C2]'
_cell_volume [455.5402]
_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
[
  Rb  Rb0  2  0.5000  0.0000  0.2106  1
  Mg  Mg1  4  0.0000  0.2356  0.5633  1
  Mg  Mg2  4  0.5000  0.2441  0.4572  1
  Mg  Mg3  2  0.0000  0.0000  0.3596  1
  Mg  Mg4  2  0.0000  0.0000  0.8533  1
  C  C5  2  0.5000  0.0000  0.5355  1
]