data_[Sr4Mg8Cr4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Mg  1.3100  1.5000  0.8600
  Cr  1.6600  1.4000  0.9400
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [4.6533]
_cell_length_b [11.5162]
_cell_length_c [8.5179]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [SrMg2Cr]
_chemical_formula_sum '[Sr4 Mg8 Cr4]'
_cell_volume [456.4574]
_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
[
  Sr  Sr0  4  0.0000  0.4446  0.7500  1
  Mg  Mg1  8  0.0000  0.1605  0.5609  1
  Cr  Cr2  4  0.0000  0.2694  0.2500  1
]