data_[Rb1Mg1Cr2O8]
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
  Cr  1.6600  1.4000  0.9400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-3m1]
_cell_length_a [5.5993]
_cell_length_b [5.5993]
_cell_length_c [7.8303]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [164]
_chemical_formula_structural [RbMgCr2O8]
_chemical_formula_sum '[Rb1 Mg1 Cr2 O8]'
_cell_volume [212.6032]
_cell_formula_units_Z [1]
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  1  0.0000  0.0000  0.0000  1
  Mg  Mg1  1  0.0000  0.0000  0.5000  1
  Cr  Cr2  2  0.3333  0.6667  0.7273  1
  O  O3  6  0.1704  0.3408  0.6583  1
  O  O4  2  0.3333  0.6667  0.9365  1
]