data_[Mg3Cr6Ag3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Cr  1.6600  1.4000  0.9400
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [R3m]
_cell_length_a [2.8871]
_cell_length_b [2.8871]
_cell_length_c [25.9925]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [160]
_chemical_formula_structural [MgCr2Ag]
_chemical_formula_sum '[Mg3 Cr6 Ag3]'
_cell_volume [187.6348]
_cell_formula_units_Z [3]
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
[
  Mg  Mg0  3  0.0000  0.0000  0.4956  1
  Cr  Cr1  3  0.0000  0.0000  0.0129  1
  Cr  Cr2  3  0.0000  0.0000  0.7367  1
  Ag  Ag3  3  0.0000  0.0000  0.2549  1
]