data_Na2NbCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.54
_cell_length_b   4.31
_cell_length_c   7.59
_cell_angle_alpha   90.0
_cell_angle_beta   96.61
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2NbCr
_chemical_formula_sum   'Na2 Nb1 Cr1'
_cell_volume   82.68
_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
  Na  Na1  1  0.59  0.16  0.31  1.0
  Na  Na2  1  0.05  0.0  0.08  1.0
  Nb  Nb3  1  0.56  0.16  0.2  1.0
  Cr  Cr0  1  0.7  0.0  0.26  1.0

data_Na2NbCr
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.54
_cell_length_b   4.31
_cell_length_c   7.59
_cell_angle_alpha   90.0
_cell_angle_beta   96.61
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2NbCr
_chemical_formula_sum   'Na2 Nb1 Cr1'
_cell_volume   82.68
_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
  Na  Na0  1  0.05  0.0  0.08  1.0
  Na  Na1  1  0.59  0.16  0.31  1.0
  Nb  Nb2  1  0.56  0.16  0.2  1.0
  Cr  Cr3  1  0.7  0.0  0.26  1.0

Na Na Nb Cr