data_[Mg4Ta2Nb4N12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Ta  1.5000  1.4500  0.8200
  Nb  1.6000  1.4500  0.8200
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [5.3676]
_cell_length_b [9.2486]
_cell_length_c [5.4625]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.9724]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Mg2Ta(NbN3)2]
_chemical_formula_sum '[Mg4 Ta2 Nb4 N12]'
_cell_volume [256.4395]
_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
[
  Mg  Mg0  4  0.0000  0.1693  0.0000  1
  Ta  Ta1  2  0.0000  0.0000  0.5000  1
  Nb  Nb2  4  0.0000  0.3367  0.5000  1
  N  N3  8  0.2356  0.1703  0.7282  1
  N  N4  4  0.2425  0.0000  0.2712  1
]