data_[Sm1Er2Ta1N4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sm  1.1700  1.8500  1.2290
  Er  1.2400  1.7500  1.0300
  Ta  1.5000  1.4500  0.8200
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [5.8109]
_cell_length_b [3.3548]
_cell_length_c [5.8647]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.1125]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [SmEr2TaN4]
_chemical_formula_sum '[Sm1 Er2 Ta1 N4]'
_cell_volume [108.0272]
_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
[
  Sm  Sm0  1  0.0000  0.5000  0.5000  1.0
  Er  Er1  1  0.5000  0.0000  0.5000  1.0
  Er  Er2  1  0.5000  0.5000  0.0000  1.0
  Ta  Ta3  1  0.0000  0.0000  0.0000  1.0
  N  N4  2  0.2339  0.5000  0.2256  1.0
  N  N5  2  0.2423  0.0000  0.7748  1.0
]