data_[Ca4Mg8Fe4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Mg  1.3100  1.5000  0.8600
  Fe  1.8300  1.4000  0.8525
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [4.3071]
_cell_length_b [10.6753]
_cell_length_c [7.9943]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [CaMg2Fe]
_chemical_formula_sum '[Ca4 Mg8 Fe4]'
_cell_volume [367.5738]
_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
[
  Ca  Ca0  4  0.0000  0.4407  0.7500  1
  Mg  Mg1  8  0.0000  0.1513  0.5579  1
  Fe  Fe2  4  0.0000  0.2710  0.2500  1
]