data_[Nd2Er2Cr2N6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Nd  1.1400  1.8500  1.2765
  Er  1.2400  1.7500  1.0300
  Cr  1.6600  1.4000  0.9400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.3468]
_cell_length_b [3.4129]
_cell_length_c [7.3897]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.4141]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NdErCrN3]
_chemical_formula_sum '[Nd2 Er2 Cr2 N6]'
_cell_volume [182.7904]
_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
[
  Nd  Nd0  2  0.1847  0.7500  0.1818  1
  Er  Er1  2  0.1667  0.7500  0.6352  1
  Cr  Cr2  2  0.4014  0.2500  0.9178  1
  N  N3  2  0.1488  0.2500  0.4096  1
  N  N4  2  0.1527  0.2500  0.8757  1
  N  N5  2  0.4808  0.7500  0.8361  1
]